diff --git a/t/index/connexor_morpho.t b/t/index/connexor_morpho.t
new file mode 100644
index 0000000..e0e0d76
--- /dev/null
+++ b/t/index/connexor_morpho.t
@@ -0,0 +1,55 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('Connexor', 'Morpho'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+like($data->{foundries}, qr!connexor/morpho!, 'data');
+is($data->{stream}->[0]->[1], '_0$<i>0<i>3', 'Position');
+is($data->{stream}->[1]->[1], 'cnx/l:letzt', 'Lemma');
+is($data->{stream}->[1]->[2], 'cnx/p:A', 'POS');
+is($data->{stream}->[2]->[1], 'cnx/l:kulturell', 'Lemma');
+is($data->{stream}->[2]->[2], 'cnx/p:A', 'POS');
+is($data->{stream}->[4]->[2], 'cnx/m:IND', 'Morpho');
+is($data->{stream}->[4]->[3], 'cnx/m:PRES', 'Morpho');
+
+is($data->{stream}->[-1]->[2], 'cnx/m:IND', 'Morpho');
+is($data->{stream}->[-1]->[3], 'cnx/m:PRES', 'Morpho');
+
+done_testing;
+
+__END__
diff --git a/t/index/connexor_phrase.t b/t/index/connexor_phrase.t
new file mode 100644
index 0000000..08eb127
--- /dev/null
+++ b/t/index/connexor_phrase.t
@@ -0,0 +1,47 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('Connexor', 'Phrase'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+
+like($data->{foundries}, qr!connexor/phrase!, 'data');
+is($data->{stream}->[1]->[0], '<>:cnx/c:np$<b>64<i>4<i>30<i>4<b>0', 'Noun phrase');
+
+done_testing;
+
+__END__
diff --git a/t/index/connexor_sentences.t b/t/index/connexor_sentences.t
new file mode 100644
index 0000000..4ce5591
--- /dev/null
+++ b/t/index/connexor_sentences.t
@@ -0,0 +1,50 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('Connexor', 'Sentences'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+
+like($data->{foundries}, qr!connexor/sentences!, 'data');
+is($data->{stream}->[0]->[0], '-:cnx/sentences$<i>1', 'Number of paragraphs');
+is($data->{stream}->[0]->[1], '-:tokens$<i>18', 'Number of tokens');
+is($data->{stream}->[0]->[2], '<>:cnx/s:s$<b>64<i>0<i>129<i>17<b>0', 'Sentence');
+is($data->{stream}->[0]->[3], '_0$<i>0<i>3', 'Position');
+
+done_testing;
+
+__END__
diff --git a/t/index/connexor_syntax.t b/t/index/connexor_syntax.t
new file mode 100644
index 0000000..ee0d22d
--- /dev/null
+++ b/t/index/connexor_syntax.t
@@ -0,0 +1,48 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('Connexor', 'Syntax'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+like($data->{foundries}, qr!connexor/syntax!, 'data');
+like($data->{layerInfos}, qr!cnx/syn=tokens!, 'data');
+is($data->{stream}->[1]->[1], 'cnx/syn:@PREMOD', 'Syntax');
+is($data->{stream}->[2]->[1], 'cnx/syn:@PREMOD', 'Syntax');
+
+done_testing;
+
+__END__
diff --git a/t/index/corenlp_constituency.t b/t/index/corenlp_constituency.t
new file mode 100644
index 0000000..bc55b95
--- /dev/null
+++ b/t/index/corenlp_constituency.t
@@ -0,0 +1,52 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('CoreNLP', 'Constituency'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+
+like($data->{foundries}, qr!corenlp/constituency!, 'data');
+like($data->{layerInfos}, qr!corenlp/c=spans!, 'data');
+
+is($data->{stream}->[0]->[1], '<>:corenlp/c:CNP$<b>64<i>0<i>16<i>2<b>2', 'Noun phrase');
+is($data->{stream}->[0]->[2], '<>:corenlp/c:ROOT$<b>64<i>0<i>42<i>6<b>0', 'Noun phrase');
+is($data->{stream}->[0]->[3], '<>:corenlp/c:NP$<b>64<i>0<i>42<i>6<b>1', 'Noun phrase');
+
+done_testing;
+
+__END__
+
diff --git a/t/index/corenlp_morpho.t b/t/index/corenlp_morpho.t
new file mode 100644
index 0000000..07bdb0f
--- /dev/null
+++ b/t/index/corenlp_morpho.t
@@ -0,0 +1,49 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('CoreNLP', 'Morpho'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+like($data->{foundries}, qr!corenlp/morpho!, 'data');
+like($data->{layerInfos}, qr!corenlp/p=tokens!, 'data');
+is($data->{stream}->[0]->[2], 'corenlp/p:APPRART', 'POS');
+is($data->{stream}->[1]->[1], 'corenlp/p:ADJ', 'POS');
+is($data->{stream}->[2]->[1], 'corenlp/p:ADJA', 'POS');
+
+done_testing;
+
+__END__
diff --git a/t/index/corenlp_sentences.t b/t/index/corenlp_sentences.t
new file mode 100644
index 0000000..fc0965e
--- /dev/null
+++ b/t/index/corenlp_sentences.t
@@ -0,0 +1,50 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('CoreNLP', 'Sentences'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+
+done_testing;
+
+__END__
+
+like($data->{foundries}, qr!corenlp/morpho!, 'data');
+like($data->{layerInfos}, qr!corenlp/p=tokens!, 'data');
+is($data->{stream}->[0]->[2], 'corenlp/p:APPRART', 'POS');
+is($data->{stream}->[1]->[1], 'corenlp/p:ADJ', 'POS');
+is($data->{stream}->[2]->[1], 'corenlp/p:ADJA', 'POS');
diff --git a/t/index/corpus/doc/text/base/paragraph.xml b/t/index/corpus/doc/text/base/paragraph.xml
index be19d62..93d479f 100644
--- a/t/index/corpus/doc/text/base/paragraph.xml
+++ b/t/index/corpus/doc/text/base/paragraph.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
 
-<layer docid="ART_00001" xmlns="http://ids-mannheim.de/ns/KorAP" version="KorAP-0.4">
+<layer docid="Corpus_Doc.0001" xmlns="http://ids-mannheim.de/ns/KorAP" version="KorAP-0.4">
   <spanList>
     <span from="0" to="129" />
   </spanList>
diff --git a/t/index/corpus/doc/text/base/sentences.xml b/t/index/corpus/doc/text/base/sentences.xml
index be19d62..93d479f 100644
--- a/t/index/corpus/doc/text/base/sentences.xml
+++ b/t/index/corpus/doc/text/base/sentences.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
 
-<layer docid="ART_00001" xmlns="http://ids-mannheim.de/ns/KorAP" version="KorAP-0.4">
+<layer docid="Corpus_Doc.0001" xmlns="http://ids-mannheim.de/ns/KorAP" version="KorAP-0.4">
   <spanList>
     <span from="0" to="129" />
   </spanList>
diff --git a/t/index/corpus/doc/text/connexor/morpho.xml b/t/index/corpus/doc/text/connexor/morpho.xml
new file mode 100644
index 0000000..3d36c46
--- /dev/null
+++ b/t/index/corpus/doc/text/connexor/morpho.xml
@@ -0,0 +1,221 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" version="KorAP-0.4" docid="Corpus_Doc.00001">
+  <spanList>
+    <span id="s8" from="0" to="2">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">zu</f>
+            <f name="pos">PREP</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s9" from="2" to="3">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">der</f>
+            <f name="pos">DET</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s10" from="4" to="11">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">letzt</f>
+            <f name="pos">A</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s11" from="12" to="23">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">kulturell</f>
+            <f name="pos">A</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s12" from="24" to="30">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">anlass</f>
+            <f name="pos">N</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s13" from="31" to="35">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">laden</f>
+            <f name="pos">V</f>
+            <f name="msd">IND:PRES</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s14" from="36" to="39">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">die</f>
+            <f name="pos">DET</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s15" from="40" to="47">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">leitung</f>
+            <f name="pos">N</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s16" from="48" to="51">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">das</f>
+            <f name="pos">DET</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s17" from="52" to="63">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">schul heim</f>
+            <f name="pos">N</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s18" from="64" to="73">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">Hofbergli</f>
+            <f name="pos">N</f>
+            <f name="msd">Prop</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s19" from="74" to="77">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">ein</f>
+            <f name="pos">NUM</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s20" from="77" to="78">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">,</f>
+            <f name="pos"></f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s21" from="79" to="84">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">bevor</f>
+            <f name="pos">CS</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s22" from="85" to="88">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">der</f>
+            <f name="pos">DET</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s23" from="89" to="96">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">betrieb</f>
+            <f name="pos">N</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s24" from="97" to="101">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">ende</f>
+            <f name="pos">N</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s25" from="102" to="111">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">schule jahr</f>
+            <f name="pos">N</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s26" from="112" to="123">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">ein stellen</f>
+            <f name="pos">V</f>
+            <f name="msd">PCP:PERF</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s27" from="124" to="128">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">werden</f>
+            <f name="pos">V</f>
+            <f name="msd">IND:PRES</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s28" from="128" to="129">
+      <fs type="lex" xmlns="http://www.tei-c.org/ns/1.0">
+        <f name="lex">
+          <fs>
+            <f name="lemma">.</f>
+            <f name="pos"></f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+  </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/connexor/phrase.xml b/t/index/corpus/doc/text/connexor/phrase.xml
new file mode 100644
index 0000000..20c92a2
--- /dev/null
+++ b/t/index/corpus/doc/text/connexor/phrase.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" version="KorAP-0.4" docid="Corpus_Doc.00001">
+  <spanList>
+    <span from="4" to="30">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+        <f name="pos">np</f>
+      </fs>
+    </span>
+    <span from="40" to="47">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+        <f name="pos">np</f>
+      </fs>
+    </span>
+    <span from="52" to="73">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+        <f name="pos">np</f>
+      </fs>
+    </span>
+    <span from="89" to="111">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+        <f name="pos">np</f>
+      </fs>
+    </span>
+  </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/connexor/sentences.xml b/t/index/corpus/doc/text/connexor/sentences.xml
new file mode 100644
index 0000000..505a404
--- /dev/null
+++ b/t/index/corpus/doc/text/connexor/sentences.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" version="KorAP-0.4" docid="Corpus_Doc.00001">
+  <spanList>
+    <span from="0" to="129" />
+  </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/connexor/syntax.xml b/t/index/corpus/doc/text/connexor/syntax.xml
new file mode 100644
index 0000000..2e05306
--- /dev/null
+++ b/t/index/corpus/doc/text/connexor/syntax.xml
@@ -0,0 +1,207 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" version="KorAP-0.4" docid="Corpus_Doc.00001">
+  <spanList>
+    <span id="s8" from="0" to="2">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">zu</f>
+            <f name="pos">@PREMARK</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s9" from="2" to="3">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">der</f>
+            <f name="pos">@PREMOD</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s10" from="4" to="11">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">letzt</f>
+            <f name="pos">@PREMOD</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s11" from="12" to="23">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">kulturell</f>
+            <f name="pos">@PREMOD</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s12" from="24" to="30">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">anlass</f>
+            <f name="pos">@NH</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s13" from="31" to="35">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">laden</f>
+            <f name="pos">@MAIN</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s14" from="36" to="39">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">die</f>
+            <f name="pos">@PREMOD</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s15" from="40" to="47">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">leitung</f>
+            <f name="pos">@NH</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s16" from="48" to="51">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">das</f>
+            <f name="pos">@PREMOD</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s17" from="52" to="63">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">schul heim</f>
+            <f name="pos">@PREMOD</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s18" from="64" to="73">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">Hofbergli</f>
+            <f name="pos">@NH</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s19" from="74" to="77">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">ein</f>
+            <f name="pos">@NH</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s20" from="77" to="78">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">,</f>
+            <f name="pos"></f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s21" from="79" to="84">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">bevor</f>
+            <f name="pos">@PREMARK</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s22" from="85" to="88">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">der</f>
+            <f name="pos">@PREMOD</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s23" from="89" to="96">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">betrieb</f>
+            <f name="pos">@PREMOD</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s24" from="97" to="101">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">ende</f>
+            <f name="pos">@NH</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s25" from="102" to="111">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">schule jahr</f>
+            <f name="pos">@NH</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s26" from="112" to="123">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">ein stellen</f>
+            <f name="pos">@MAIN</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+    <span id="s27" from="124" to="128">
+      <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+        <f name="lex">
+          <fs>
+            <f name="lemma">werden</f>
+            <f name="pos">@AUX</f>
+          </fs>
+        </f>
+      </fs>
+    </span>
+  </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/corenlp/constituency.xml b/t/index/corpus/doc/text/corenlp/constituency.xml
new file mode 100644
index 0000000..895c732
--- /dev/null
+++ b/t/index/corpus/doc/text/corenlp/constituency.xml
@@ -0,0 +1,182 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="Corpus_Doc.00001" version="KorAP-0.4">
+   <spanList>
+      <span id="s1_n1" from="0" to="42">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ROOT</f>
+         </fs>
+         <rel label="dominates" target="s1_n2"/>
+      </span>
+      <span id="s1_n2" from="0" to="42">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" target="s1_n3"/>
+         <rel label="dominates" target="s1_n10"/>
+         <rel label="dominates" uri="morpho.xml#s1_n17"/>
+      </span>
+      <span id="s1_n3" from="0" to="16">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">CNP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n4"/>
+         <rel label="dominates" uri="morpho.xml#s1_n6"/>
+         <rel label="dominates" uri="morpho.xml#s1_n8"/>
+      </span>
+      <span id="s1_n4" from="0" to="7">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NE</f>
+         </fs>
+      </span>
+      <span id="s1_n6" from="8" to="11">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">KON</f>
+         </fs>
+      </span>
+      <span id="s1_n8" from="12" to="16">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s1_n10" from="17" to="41">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n11"/>
+         <rel label="dominates" uri="morpho.xml#s1_n13"/>
+         <rel label="dominates" uri="morpho.xml#s1_n15"/>
+      </span>
+      <span id="s1_n11" from="17" to="19">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">APPRART</f>
+         </fs>
+      </span>
+      <span id="s1_n13" from="20" to="31">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s1_n15" from="32" to="41">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NE</f>
+         </fs>
+      </span>
+      <span id="s1_n17" from="41" to="42">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">$.</f>
+         </fs>
+      </span>
+<!--
+      <span id="s2_n1" from="43" to="172">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ROOT</f>
+         </fs>
+         <rel label="dominates" target="s2_n2"/>
+      </span>
+      <span id="s2_n2" from="43" to="172">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">S</f>
+         </fs>
+         <rel label="dominates" target="s2_n3"/>
+         <rel label="dominates" uri="morpho.xml#s2_n12"/>
+         <rel label="dominates" target="s2_n14"/>
+         <rel label="dominates" uri="morpho.xml#s2_n26"/>
+         <rel label="dominates" uri="morpho.xml#s2_n28"/>
+         <rel label="dominates" target="s2_n30"/>
+         <rel label="dominates" uri="morpho.xml#s2_n48"/>
+      </span>
+-->
+      <span id="s2_n3" from="43" to="73">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s2_n4"/>
+         <rel label="dominates" uri="morpho.xml#s2_n6"/>
+         <rel label="dominates" uri="morpho.xml#s2_n8"/>
+         <rel label="dominates" uri="morpho.xml#s2_n10"/>
+      </span>
+      <span id="s2_n4" from="43" to="46">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">APPRART</f>
+         </fs>
+      </span>
+      <span id="s2_n6" from="47" to="54">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADJA</f>
+         </fs>
+      </span>
+      <span id="s2_n8" from="55" to="66">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADJA</f>
+         </fs>
+      </span>
+      <span id="s2_n10" from="67" to="73">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s2_n12" from="74" to="78">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">VVFIN</f>
+         </fs>
+      </span>
+      <span id="s2_n14" from="79" to="116">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP-SB</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s2_n15"/>
+         <rel label="dominates" uri="morpho.xml#s2_n17"/>
+         <rel label="dominates" target="s2_n19"/>
+      </span>
+      <span id="s2_n15" from="79" to="82">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ART</f>
+         </fs>
+      </span>
+      <span id="s2_n17" from="83" to="90">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s2_n19" from="91" to="116">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s2_n20"/>
+         <rel label="dominates" uri="morpho.xml#s2_n22"/>
+         <rel label="dominates" uri="morpho.xml#s2_n24"/>
+      </span>
+      <span id="s2_n20" from="91" to="94">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ART</f>
+         </fs>
+      </span>
+      <span id="s2_n22" from="95" to="106">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s2_n24" from="107" to="116">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NE</f>
+         </fs>
+      </span>
+      <span id="s2_n26" from="117" to="120">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PTKVZ</f>
+         </fs>
+      </span>
+      <span id="s2_n28" from="120" to="121">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">$,</f>
+         </fs>
+      </span>
+      <span id="s2_n31" from="122" to="127">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">KOUS</f>
+         </fs>
+      </span>
+   </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/corenlp/morpho.xml b/t/index/corpus/doc/text/corenlp/morpho.xml
new file mode 100644
index 0000000..559d25b
--- /dev/null
+++ b/t/index/corpus/doc/text/corenlp/morpho.xml
@@ -0,0 +1,187 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="Corpus_Doc.0001" version="KorAP-0.4">
+   <spanList>
+      <span id="s2_n4" from="0" to="3">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">APPRART</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n6" from="4" to="11">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ADJ</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n8" from="12" to="23">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ADJA</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n10" from="24" to="30">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n12" from="31" to="35">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">VVFIN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n15" from="36" to="39">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ART</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n17" from="40" to="47">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n20" from="48" to="51">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ART</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n22" from="52" to="63">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n24" from="64" to="73">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NE</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n26" from="74" to="77">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">PTKVZ</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s2_n28" from="77" to="78">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
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+   </spanList>
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diff --git a/t/index/corpus/doc/text/corenlp/ne_dewac_175m_600.xml b/t/index/corpus/doc/text/corenlp/ne_dewac_175m_600.xml
new file mode 100644
index 0000000..6359ac8
--- /dev/null
+++ b/t/index/corpus/doc/text/corenlp/ne_dewac_175m_600.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="ART_00001" version="KorAP-0.4">
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+      <span id="s_18" from="64" to="73">
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+            <f name="ne">
+               <fs>
+                  <f name="ent">I-LOC</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+   </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/corenlp/ne_hgc_175m_600.xml b/t/index/corpus/doc/text/corenlp/ne_hgc_175m_600.xml
new file mode 100644
index 0000000..6359ac8
--- /dev/null
+++ b/t/index/corpus/doc/text/corenlp/ne_hgc_175m_600.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="ART_00001" version="KorAP-0.4">
+   <spanList>
+      <span id="s_18" from="64" to="73">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="ne">
+            <f name="ne">
+               <fs>
+                  <f name="ent">I-LOC</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+   </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/corenlp/sentences.xml b/t/index/corpus/doc/text/corenlp/sentences.xml
new file mode 100644
index 0000000..f0a9d0a
--- /dev/null
+++ b/t/index/corpus/doc/text/corenlp/sentences.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
+<layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="Corpus_Doc.0001" version="KorAP-0.4">
+   <spanList>
+      <span from="0" to="129"/>
+   </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/corenlp/tokens.xml b/t/index/corpus/doc/text/corenlp/tokens.xml
new file mode 100644
index 0000000..78f562b
--- /dev/null
+++ b/t/index/corpus/doc/text/corenlp/tokens.xml
@@ -0,0 +1,226 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
+
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+   </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/data.xml b/t/index/corpus/doc/text/data.xml
index 6b5af0f..3a12d04 100644
--- a/t/index/corpus/doc/text/data.xml
+++ b/t/index/corpus/doc/text/data.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-model href="text.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
 
-<raw_text docid="ART_ABC.00001" xmlns="http://ids-mannheim.de/ns/KorAP">
+<raw_text docid="Corpus_Doc.0001" xmlns="http://ids-mannheim.de/ns/KorAP">
   <metadata file="metadata.xml" />
   <text>Zum letzten kulturellen Anlass lädt die Leitung des Schulheimes Hofbergli ein, bevor der Betrieb Ende Schuljahr eingestellt wird.</text>
 </raw_text>
diff --git a/t/index/corpus/doc/text/opennlp/morpho.xml b/t/index/corpus/doc/text/opennlp/morpho.xml
new file mode 100644
index 0000000..65171b4
--- /dev/null
+++ b/t/index/corpus/doc/text/opennlp/morpho.xml
@@ -0,0 +1,184 @@
+<?xml version="1.0" encoding="UTF-8"?><?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?><layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="Corpus_Doc.00001" VERSION="KorAP-0.4">
+   <spanList>
+      <span id="s_7" from="0" to="3">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">APPRART</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_8" from="4" to="11">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ADJA</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_9" from="12" to="23">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ADJA</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_10" from="24" to="30">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
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+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_11" from="31" to="35">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
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+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_12" from="36" to="39">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ART</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_13" from="40" to="47">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_14" from="48" to="51">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ART</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_15" from="52" to="63">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_16" from="64" to="73">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NE</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_17" from="74" to="77">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">PTKVZ</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_18" from="77" to="78">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">$,</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_19" from="79" to="84">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">KOUS</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_20" from="85" to="88">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">ART</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_21" from="89" to="96">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_22" from="97" to="101">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_23" from="102" to="111">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">NN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_24" from="112" to="123">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">VVPP</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_25" from="124" to="128">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">VAFIN</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+      <span id="s_26" from="128" to="129">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="lex">
+            <f name="lex">
+               <fs>
+                  <f name="pos">$.</f>
+               </fs>
+            </f>
+         </fs>
+      </span>
+   </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/opennlp/sentences.xml b/t/index/corpus/doc/text/opennlp/sentences.xml
new file mode 100644
index 0000000..b35317b
--- /dev/null
+++ b/t/index/corpus/doc/text/opennlp/sentences.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?><layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="Corpus_Doc.0001" VERSION="KorAP-0.4">
+   <spanList>
+      <span from="0" to="129"/>
+   </spanList>
+</layer>
diff --git a/t/index/corpus/doc/text/opennlp/tokens.xml b/t/index/corpus/doc/text/opennlp/tokens.xml
index b181a49..cd56e1c 100644
--- a/t/index/corpus/doc/text/opennlp/tokens.xml
+++ b/t/index/corpus/doc/text/opennlp/tokens.xml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?><?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?><layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="ART_00001" VERSION="KorAP-0.4">
+<?xml version="1.0" encoding="UTF-8"?><?xml-model href="span.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?><layer xmlns="http://ids-mannheim.de/ns/KorAP" docid="Corpus_Doc.0001" VERSION="KorAP-0.4">
 <spanList>
       <span id="s_7" from="0" to="3"/>
       <span id="s_8" from="4" to="11"/>
diff --git a/t/index/opennlp_morpho.t b/t/index/opennlp_morpho.t
new file mode 100644
index 0000000..383f758
--- /dev/null
+++ b/t/index/opennlp_morpho.t
@@ -0,0 +1,52 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('OpenNLP', 'Morpho'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+
+like($data->{foundries}, qr!opennlp/morpho!, 'data');
+is($data->{stream}->[0]->[1], '_0$<i>0<i>3', 'Position');
+is($data->{stream}->[0]->[3], 'opennlp/p:APPRART', 'POS');
+is($data->{stream}->[1]->[2], 'opennlp/p:ADJA', 'POS');
+is($data->{stream}->[2]->[2], 'opennlp/p:ADJA', 'POS');
+is($data->{stream}->[-1]->[2], 'opennlp/p:VAFIN', 'POS');
+
+done_testing;
+
+__END__
+
diff --git a/t/index/opennlp_sentences.t b/t/index/opennlp_sentences.t
new file mode 100644
index 0000000..740d98a
--- /dev/null
+++ b/t/index/opennlp_sentences.t
@@ -0,0 +1,50 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use utf8;
+use Test::More;
+use Scalar::Util qw/weaken/;
+use Data::Dumper;
+
+use_ok('KorAP::Document');
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+my $path = catdir(dirname(__FILE__), 'corpus', 'doc', 'text');
+
+ok(my $doc = KorAP::Document->new(
+  path => $path . '/'
+), 'Load Korap::Document');
+
+like($doc->path, qr!$path/$!, 'Path');
+ok($doc->parse, 'Parse document');
+
+ok($doc->primary->data, 'Primary data in existence');
+is($doc->primary->data_length, 129, 'Data length');
+
+use_ok('KorAP::Tokenizer');
+
+ok(my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => 'OpenNLP',
+  layer => 'Tokens',
+  name => 'tokens'
+), 'New Tokenizer');
+
+ok($tokens->parse, 'Parse');
+
+ok($tokens->add('OpenNLP', 'Sentences'), 'Add Structure');
+
+my $data = $tokens->to_data->{data};
+
+like($data->{foundries}, qr!opennlp/sentences!, 'data');
+is($data->{stream}->[0]->[0], '-:opennlp/sentences$<i>1', 'Number of Sentences');
+is($data->{stream}->[0]->[1], '-:tokens$<i>18', 'Number of tokens');
+is($data->{stream}->[0]->[2], '<>:opennlp/s:s$<b>64<i>0<i>129<i>17<b>0', 'Sentence');
+is($data->{stream}->[0]->[3], '_0$<i>0<i>3', 'Position');
+
+done_testing;
+
+__END__