diff --git a/t/artificial.t b/t/artificial.t
index 5b5210f..10d4429 100644
--- a/t/artificial.t
+++ b/t/artificial.t
@@ -59,8 +59,9 @@
 is($tokens->name, 'tokens', 'Name');
 is($tokens->layer, 'Tokens', 'Layer');
 
-is($tokens->stream->pos(0)->to_string, '[(0-3)s:Zum|i:zum|_0#0-3|-:tokens$<i>18]', 'Token is correct');
-is($tokens->stream->pos(1)->to_string, '[(4-11)s:letzten|i:letzten|_1#4-11]', 'Token is correct');
+is($tokens->stream->pos(0)->to_string, '[(0-3)-:tokens$<i>18|_0#0-3|i:zum|s:Zum]', 'Token is correct');
+
+is($tokens->stream->pos(1)->to_string, '[(4-11)_1#4-11|i:letzten|s:letzten]', 'Token is correct');
 
 my $i = 2;
 foreach ([12,23, 'kulturellen'],
@@ -82,8 +83,8 @@
        ) {
   is($tokens->stream->pos($i++)->to_string,
      '[('.$_->[0].'-'.$_->[1].')'.
-       's:'.$_->[2].'|i:'.lc($_->[2]).'|'.
-       '_'.($i-1).'#'.$_->[0].'-'.$_->[1].']',
+       '_'.($i-1).'#'.$_->[0].'-'.$_->[1] . '|' .
+	 'i:'.lc($_->[2]).'|s:'.$_->[2].']',
      'Token is correct');
 };
 
@@ -92,6 +93,7 @@
 # Add OpenNLP/morpho
 ok($tokens->add('OpenNLP', 'Morpho'), 'Add OpenNLP/Morpho');
 
+
 $i = 0;
 foreach (qw/APPRART ADJA ADJA NN VVFIN ART NN ART NN NE PTKVZ KOUS ART NN NN NN VVPP VAFIN/) {
   like($tokens->stream->pos($i++)->to_string,
@@ -103,8 +105,7 @@
 # Add OpenNLP/sentences
 ok($tokens->add('OpenNLP', 'Sentences'), 'Add OpenNLP/Sentences');
 
-is($tokens->stream->pos(0)->to_string, '[(0-3)s:Zum|i:zum|_0#0-3|-:tokens$<i>18|opennlp/p:APPRART|<>:opennlp/s:s#0-129$<i>17|-:opennlp/sentences$<i>1]', 'Correct sentence');
-
+is($tokens->stream->pos(0)->to_string, '[(0-3)-:opennlp/sentences$<i>1|-:tokens$<i>18|_0#0-3|i:zum|s:Zum|opennlp/p:APPRART|<>:opennlp/s:s#0-129$<i>17]', 'Correct sentence');
 
 # New instantiation
 ok($tokens = KorAP::Tokenizer->new(
@@ -124,7 +125,7 @@
 ok($tokens->add('Base', 'Paragraphs'), 'Add Base/Paragraphs');
 
 is($tokens->stream->pos(0)->to_string,
-   '[(0-3)s:Zum|i:zum|_0#0-3|-:tokens$<i>18|<>:base/s:s#0-129$<i>17|<>:base/s:t#0-129$<i>17|-:base/sentences$<i>1|-:base/paragraphs$<i>0]',
+   '[(0-3)-:base/paragraphs$<i>0|-:base/sentences$<i>1|-:tokens$<i>18|_0#0-3|i:zum|s:Zum|<>:base/s:t#0-129$<i>17<b>0|<>:base/s:s#0-129$<i>17<b>0]',
    'Correct base annotation');
 
 
@@ -135,11 +136,11 @@
 ok($tokens->add('CoreNLP', 'NamedEntities', 'ne_dewac_175m_600'), 'Add CoreNLP/NamedEntities');
 ok($tokens->add('CoreNLP', 'NamedEntities', 'ne_hgc_175m_600'), 'Add CoreNLP/NamedEntities');
 
+# [(64-73)s:Hofbergli|i:hofbergli|_9#64-73|corenlp/ne_dewac_175m_600:I-LOC|corenlp/ne_hgc_175m_600:I-LOC]
 is($tokens->stream->pos(9)->to_string,
-   '[(64-73)s:Hofbergli|i:hofbergli|_9#64-73|corenlp/ne_dewac_175m_600:I-LOC|corenlp/ne_hgc_175m_600:I-LOC]',
+   '[(64-73)_9#64-73|corenlp/ne:I-LOC|i:hofbergli|s:Hofbergli]',
    'Correct NamedEntities annotation');
 
-
 # New instantiation
 ok($tokens = new_tokenizer->parse, 'Parse');
 
@@ -147,7 +148,7 @@
 ok($tokens->add('CoreNLP', 'Morpho'), 'Add CoreNLP/Morpho');
 
 is($tokens->stream->pos(0)->to_string,
-   '[(0-3)s:Zum|i:zum|_0#0-3|-:tokens$<i>18|corenlp/p:APPRART]',
+   '[(0-3)-:tokens$<i>18|_0#0-3|i:zum|s:Zum|corenlp/p:APPRART]',
    'Correct corenlp annotation');
 
 $i = 0;
@@ -161,10 +162,9 @@
 ok($tokens->add('CoreNLP', 'Sentences'), 'Add CoreNLP/Sentences');
 
 is($tokens->stream->pos(0)->to_string,
-   '[(0-3)s:Zum|i:zum|_0#0-3|-:tokens$<i>18|corenlp/p:APPRART|<>:corenlp/s:s#0-129$<i>17|-:corenlp/sentences$<i>1]',
+   '[(0-3)-:corenlp/sentences$<i>1|-:tokens$<i>18|_0#0-3|i:zum|s:Zum|corenlp/p:APPRART|<>:corenlp/s:s#0-129$<i>17]',
    'Correct corenlp annotation');
 
-
 # New instantiation
 ok($tokens = new_tokenizer->parse, 'New Tokenizer');
 
@@ -172,7 +172,7 @@
 ok($tokens->add('Connexor', 'Sentences'), 'Add Connexor/Sentences');
 
 is($tokens->stream->pos(0)->to_string,
-   '[(0-3)s:Zum|i:zum|_0#0-3|-:tokens$<i>18|<>:cnx/s:s#0-129$<i>17|-:cnx/sentences$<i>1]',
+   '[(0-3)-:cnx/sentences$<i>1|-:tokens$<i>18|_0#0-3|i:zum|s:Zum|<>:cnx/s:s#0-129$<i>17<b>0]',
    'Correct cnx annotation');
 
 # New instantiation
@@ -192,6 +192,7 @@
        'Annotation (Connexor/p) is correct: ' . $_);
 };
 
+
 $i = 0;
 foreach (qw/! ! ! ! IND:PRES ! ! ! ! Prop ! ! ! ! ! ! PCP:PERF IND:PRES/) {
   if ($_ eq '!') {
@@ -212,10 +213,10 @@
 # Add Connexor/Phrase
 ok($tokens->add('Connexor', 'Phrase'), 'Add Connexor/Phrase');
 my $stream = $tokens->stream;
-like($stream->pos(1)->to_string, qr!\|<>:cnx/c:np#4-30\$<i>4!, 'Annotation (Connexor/c) is correct');
-like($stream->pos(6)->to_string, qr!\|<>:cnx/c:np#40-47\$<i>7!, 'Annotation (Connexor/c) is correct');
-like($stream->pos(8)->to_string, qr!\|<>:cnx/c:np#52-73\$<i>10!, 'Annotation (Connexor/c) is correct');
-like($stream->pos(13)->to_string, qr!\|<>:cnx/c:np#89-111\$<i>16!, 'Annotation (Connexor/c) is correct');
+like($stream->pos(1)->to_string, qr!\|<>:cnx/c:np#4-30\$<i>4<b>0!, 'Annotation (Connexor/c) is correct');
+like($stream->pos(6)->to_string, qr!\|<>:cnx/c:np#40-47\$<i>7<b>0!, 'Annotation (Connexor/c) is correct');
+like($stream->pos(8)->to_string, qr!\|<>:cnx/c:np#52-73\$<i>10<b>0!, 'Annotation (Connexor/c) is correct');
+like($stream->pos(13)->to_string, qr!\|<>:cnx/c:np#89-111\$<i>16<b>0!, 'Annotation (Connexor/c) is correct');
 
 # New instantiation
 ok($tokens = new_tokenizer->parse, 'New Tokenizer');
@@ -242,7 +243,7 @@
 # Add XIP/Sentences
 ok($tokens->add('XIP', 'Sentences'), 'Add XIP/Sentences');
 
-is($tokens->stream->pos(0)->to_string, '[(0-3)s:Zum|i:zum|_0#0-3|-:tokens$<i>18|<>:xip/s:s#0-129$<i>17|-:xip/sentences$<i>1]', 'First sentence');
+is($tokens->stream->pos(0)->to_string, '[(0-3)-:tokens$<i>18|_0#0-3|i:zum|s:Zum|-:xip/sentences$<i>1|<>:xip/s:s#0-129$<i>17<b>0]', 'First sentence');
 
 # Add XIP/Morpho
 ok($tokens->add('XIP', 'Morpho'), 'Add XIP/Morpho');
diff --git a/t/real_goethe.t b/t/real_goethe.t
index e2d6984..15fa677 100644
--- a/t/real_goethe.t
+++ b/t/real_goethe.t
@@ -7,6 +7,10 @@
 use Data::Dumper;
 use JSON::XS;
 
+use Benchmark qw/:hireswallclock/;
+
+my $t = Benchmark->new;
+
 use utf8;
 use lib 'lib', '../lib';
 
@@ -67,7 +71,7 @@
 
 is($output->{foundries}, '', 'Foundries');
 is($output->{layerInfos}, '', 'layerInfos');
-is($output->{data}->[0]->[0], 's:Autobiographische', 'data');
+is($output->{data}->[0]->[3], 's:Autobiographische', 'data');
 
 is($output->{textSigle}, 'GOE_AGA.03828', 'Correct text sigle');
 is($output->{docSigle}, 'GOE_AGA', 'Correct document sigle');
@@ -101,8 +105,8 @@
 my $first_token = join('||', @{$output->{data}->[0]});
 like($first_token, qr/s:Autobiographische/, 'data');
 like($first_token, qr/_0#0-17/, 'data');
-like($first_token, qr!<>:base/s:s#0-30\$<i>2!, 'data');
-like($first_token, qr!<>:base\/s:t#0-35199\$<i>5226!, 'data');
+like($first_token, qr!<>:base/s:s#0-30\$<i>2<b>2!, 'data');
+like($first_token, qr!<>:base\/s:t#0-35199\$<i>5226<b>0!, 'data');
 
 ## OpenNLP
 $tokens->add('OpenNLP', 'Sentences');
@@ -132,8 +136,7 @@
    'Foundries');
 is($output->{layerInfos}, 'base/s=spans opennlp/p=tokens opennlp/s=spans tt/s=spans', 'layerInfos');
 $first_token = join('||', @{$output->{data}->[0]});
-like($first_token, qr!<>:tt/s:s#0-179\$<i>21!, 'data');
-
+like($first_token, qr!<>:tt/s:s#0-179\$<i>21<b>2!, 'data');
 
 $tokens->add('TreeTagger', 'Morpho');
 $output = decode_json( $tokens->to_json );
@@ -147,7 +150,6 @@
 like($first_token, qr!tt/l:Autobiographische\$<b>89!, 'data');
 like($first_token, qr!tt/p:NN\$<b>89!, 'data');
 
-
 ## CoreNLP
 $tokens->add('CoreNLP', 'NamedEntities');
 $output = decode_json( $tokens->to_json );
@@ -171,7 +173,6 @@
 $first_token = join('||', @{$output->{data}->[0]});
 like($first_token, qr!<>:corenlp/s:s#0-254\$<i>32!, 'data');
 
-
 $tokens->add('CoreNLP', 'Morpho');
 $output = decode_json( $tokens->to_json );
 like($output->{foundries}, qr!corenlp/morpho!, 'Foundries');
@@ -179,7 +180,33 @@
 $first_token = join('||', @{$output->{data}->[0]});
 like($first_token, qr!corenlp/p:ADJA!, 'data');
 
-fail('Check for Constiuency!');
+$tokens->add('CoreNLP', 'Constituency');
+$output = decode_json( $tokens->to_json );
+like($output->{foundries}, qr!corenlp/constituency!, 'Foundries');
+like($output->{layerInfos}, qr!corenlp/c=spans!, 'layerInfos');
+$first_token = join('||', @{$output->{data}->[0]});
+
+#           '<>:corenlp/c:ADJA#0-17$<i>1<b>0',
+#           '<>:corenlp/c:NP#0-17$<i>1<b>0',
+#           '<>:corenlp/c:CNP#0-17$<i>1<b>1',
+#           '<>:corenlp/c:NP#0-17$<i>1<b>2',
+#           '<>:corenlp/c:AP#0-17$<i>1<b>3',
+#           '<>:corenlp/c:PP#0-58$<i>5<b>2',
+#           '<>:corenlp/c:S#0-58$<i>5<b>3',
+#           '<>:corenlp/c:ROOT#0-254$<i>32<b>0',
+#           '<>:corenlp/c:S#0-254$<i>32<b>1',
+
+#like($first_token, qr!<>:corenlp/c:ADJA#0-17$<i>1<b>0!, 'data');
+#like($first_token, qr!<>:corenlp/c:NP#0-17$<i>1<b>0!, 'data');
+
+
+
+diag Dumper $output->{data}->[0];
+
+
+done_testing;
+__END__
+
 
 ## Glemm
 $tokens->add('Glemm', 'Morpho');
@@ -193,15 +220,13 @@
 like($first_token, qr!glemm/l:\+\+Biograph!, 'data');
 like($first_token, qr!glemm/l:\+\+-isch!, 'data');
 
-
 ## Connexor
 $tokens->add('Connexor', 'Sentences');
 $output = decode_json( $tokens->to_json );
 like($output->{foundries}, qr!connexor/sentences!, 'Foundries');
 like($output->{layerInfos}, qr!cnx/s=spans!, 'layerInfos');
 $first_token = join('||', @{$output->{data}->[0]});
-like($first_token, qr!<>:cnx/s:s#0-179\$<i>21!, 'data');
-
+like($first_token, qr!<>:cnx/s:s#0-179\$<i>21<b>2!, 'data');
 
 $tokens->add('Connexor', 'Morpho');
 $output = decode_json( $tokens->to_json );
@@ -220,7 +245,6 @@
 $first_token = join('||', @{$output->{data}->[0]});
 like($first_token, qr!<>:cnx/c:np#0-30\$<i>2!, 'data');
 
-
 $tokens->add('Connexor', 'Syntax');
 $output = decode_json( $tokens->to_json );
 like($output->{foundries}, qr!connexor/syntax!, 'Foundries');
@@ -236,13 +260,55 @@
 like($output->{layerInfos}, qr!mate/l=tokens!, 'layerInfos');
 like($output->{layerInfos}, qr!mate/m=tokens!, 'layerInfos');
 $first_token = join('||', @{$output->{data}->[0]});
-like($first_token, qr!---!, 'data');
+like($first_token, qr!mate/l:autobiographisch!, 'data');
+like($first_token, qr!mate/p:NN!, 'data');
+like($first_token, qr!mate/m:case:nom!, 'data');
+like($first_token, qr!mate/m:number:pl!, 'data');
+like($first_token, qr!mate/m:gender:\*!, 'data');
+
+
+fail("No test for mate dependency");
+
+## XIP
+$tokens->add('XIP', 'Sentences');
+$output = decode_json( $tokens->to_json );
+like($output->{foundries}, qr!xip/sentences!, 'Foundries');
+like($output->{layerInfos}, qr!xip/s=spans!, 'layerInfos');
+$first_token = join('||', @{$output->{data}->[0]});
+like($first_token, qr!<>:xip/s:s#0-179\$<i>21!, 'data');
+
+$tokens->add('XIP', 'Morpho');
+$output = decode_json( $tokens->to_json );
+like($output->{foundries}, qr!xip/morpho!, 'Foundries');
+like($output->{layerInfos}, qr!xip/l=tokens!, 'layerInfos');
+like($output->{layerInfos}, qr!xip/p=tokens!, 'layerInfos');
+$first_token = join('||', @{$output->{data}->[0]});
+like($first_token, qr!<>:xip/s:s#0-179\$<i>21!, 'data');
+
+
+# print timestr(timediff(Benchmark->new, $t));
+# 57.6802 wallclock secs (57.15 usr +  0.12 sys = 57.27 CPU)# $VAR1 = [
+# 55.026 wallclock secs (54.44 usr +  0.10 sys = 54.54 CPU)# $VAR1 = [
+# 55.3887 wallclock secs (54.62 usr +  0.17 sys = 54.79 CPU)# $VAR1 = [
+# 54.9578 wallclock secs (54.51 usr +  0.13 sys = 54.64 CPU)# $VAR1 = [
+# 53.7051 wallclock secs (53.42 usr +  0.11 sys = 53.53 CPU)# $VAR1 = [
+# 47.6566 wallclock secs (46.88 usr +  0.15 sys = 47.03 CPU)# $VAR1 = [
+# 47.2379 wallclock secs (46.60 usr +  0.11 sys = 46.71 CPU)# $VAR1 = [
+# 29.563 wallclock secs (29.37 usr +  0.10 sys = 29.47 CPU)# $VAR1 = [
+# 30.9321 wallclock secs (30.69 usr +  0.14 sys = 30.83 CPU)# $VAR1 = [
+
+$tokens->add('XIP', 'Constituency');
+$output = decode_json( $tokens->to_json );
+like($output->{foundries}, qr!xip/constituency!, 'Foundries');
+like($output->{layerInfos}, qr!xip/c=spans!, 'layerInfos');
+$first_token = join('||', @{$output->{data}->[0]});
+like($first_token, qr!<>:xip/c:NP#0-17\$<i>1<b>1!, 'data');
+like($first_token, qr!<>:xip/c:AP#0-17\$<i>1<b>2!, 'data');
+like($first_token, qr!<>:xip/c:ADJ#0-17\$<i>1<b>3!, 'data');
+like($first_token, qr!<>:xip/c:TOP#0-179\$<i>21<b>0!, 'data');
 
 diag Dumper $output->{data}->[0];
 
 
-diag "Use token-ids in tokens!";
-diag "Sort tokens based on positions!";
-
 done_testing;
 __END__
diff --git a/t/real_goethe_xip_constituency.t b/t/real_goethe_xip_constituency.t
new file mode 100644
index 0000000..2281d1a
--- /dev/null
+++ b/t/real_goethe_xip_constituency.t
@@ -0,0 +1,48 @@
+#!/usr/bin/env perl
+# source ~/perl5/perlbrew/etc/bashrc
+# perlbrew switch perl-blead@korap
+use strict;
+use warnings;
+use Test::More;
+use Data::Dumper;
+use JSON::XS;
+
+use utf8;
+use lib 'lib', '../lib';
+
+use File::Basename 'dirname';
+use File::Spec::Functions 'catdir';
+
+use_ok('KorAP::Document');
+
+# GOE/AGA/03828
+my $path = catdir(dirname(__FILE__), 'GOE/AGA/03828');
+
+ok(my $doc = KorAP::Document->new( path => $path . '/' ), 'Load Korap::Document');
+ok($doc->parse, 'Parse document');
+
+# Tokenization
+use_ok('KorAP::Tokenizer');
+
+my ($token_base_foundry, $token_base_layer) = (qw/OpenNLP Tokens/);
+
+# Get tokenization
+my $tokens = KorAP::Tokenizer->new(
+  path => $doc->path,
+  doc => $doc,
+  foundry => $token_base_foundry,
+  layer => $token_base_layer,
+  name => 'tokens'
+);
+ok($tokens, 'Token Object is fine');
+ok($tokens->parse, 'Token parsing is fine');
+
+$tokens->add('XIP', 'Constituency');
+my $output = decode_json( $tokens->to_json );
+is($output->{foundries}, 'xip xip/constituency', 'Foundries');
+is($output->{layerInfos}, 'xip/c=rels', 'layerInfos');
+is($output->{layerInfos}, '', 'layerInfos');
+my $first_token = join('||', @{$output->{data}->[0]});
+#like($first_token, qr!<>:xip/s:s#0-179\$<i>21!, 'data');
+
+diag Dumper $output->{data}->[0];
diff --git a/t/sort_tokens.t b/t/sort_tokens.t
new file mode 100644
index 0000000..d698cac
--- /dev/null
+++ b/t/sort_tokens.t
@@ -0,0 +1,100 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Test::More;
+use Mojo::ByteStream 'b';
+use utf8;
+use lib 'lib', '../lib';
+
+use_ok('KorAP::Field::MultiTermTokenStream');
+
+ok(my $mtt = KorAP::Field::MultiTermToken->new, 'New token');
+ok($mtt->o_start(0), 'Set start character offset');
+ok($mtt->o_end(5), 'Set end character offset');
+ok($mtt->add(term => '@:k=N',
+	     payload =>'<s>9'), 'Add token');
+ok($mtt->add(term => 'a=N',
+	     payload =>'<b>144'), 'Add token');
+ok($mtt->add(term => '<>:b=N',
+	     o_start => 0,
+	     o_end => 5,
+	     p_end => 5), 'Add token');
+ok($mtt->add(term => 'c=N', payload => '<b>144'), 'Add token');
+ok($mtt->add(term => '<>:d=N',
+	     o_start => 0,
+	     o_end => 5,
+	     p_end => 6,
+	     payload => '<b>7'), 'Add token');
+ok($mtt->add(term => '@:j=N',
+	     payload =>'<s>8'), 'Add token');
+ok($mtt->add(term => '<>:e=ADJ',
+	     o_start => 0,
+	     o_end => 5,
+	     p_end => 6,
+	     payload => '<b>6'), 'Add token');
+ok($mtt->add(term => '<>:f=N',
+	     o_start => 0,
+	     o_end => 5,
+	     p_end => 6,
+	     payload => '<b>5<b>122'), 'Add token');
+ok($mtt->add(term => 'g=N',
+	     payload =>'<b>144'), 'Add token');
+ok($mtt->add(term => '@:h=N',
+	     payload =>'<s>5'), 'Add token');
+ok($mtt->add(term => '@:i=N',
+	     payload =>'<s>3'), 'Add token');
+
+is($mtt->to_string,'[(0-5)<>:b=N#0-5$<i>5|<>:f=N#0-5$<i>6<b>5<b>122|<>:e=ADJ#0-5$<i>6<b>6|<>:d=N#0-5$<i>6<b>7|@:i=N$<s>3|@:h=N$<s>5|@:j=N$<s>8|@:k=N$<s>9|a=N$<b>144|c=N$<b>144|g=N$<b>144]', 'Check string');
+
+ok($mtt = KorAP::Field::MultiTermToken->new, 'New token');
+ok($mtt->o_start(0), 'Set start character offset');
+ok($mtt->o_end(5), 'Set end character offset');
+
+# 2-7 to 2-4
+ok($mtt->add(term => '<:child-of', p_end => 7, payload => '<i>2<i>4<s>5<s>4<s>3'), 'New rel');
+
+# 2-4 to 3
+ok($mtt->add(term => '<:child-of', p_end => 4, payload => '<b>0<i>3<s>3<s>3<s>1'), 'New rel');
+
+# 2 to 2-4
+# <i>startright<i>endright<s>relation-id<s>left-id<s>right-id
+ok($mtt->add(term => '>:child-of', payload => '<i>2<i>4<s>2<s>1<s>3'), 'New rel');
+
+# 2-4 to 2-7
+ok($mtt->add(term => '>:child-of', p_end => 4, payload => '<i>2<i>7<s>1<s>3<s>4'), 'New rel');
+
+# 2-4 t0 4
+ok($mtt->add(term => '<:child-of', p_end => 4, payload => '<b>0<i>4<s>4<s>3<s>1'), 'New rel');
+
+# 2-7 to 1-7
+ok($mtt->add(term => '>:child-of', p_end => 7, payload => '<i>1<i>7<s>2<s>4<s>2'), 'New rel');
+
+# 2-7 to 4-7
+ok($mtt->add(term => '<:child-of', p_end => 7, payload => '<i>4<i>7<s>6<s>4<s>2'), 'New rel');
+
+# 2 to 3
+ok($mtt->add(term => '>:child-of', payload => '<i>3<s>2<s>4<s>2'), 'New rel');
+
+is($mtt->to_string, '[(0-5)>:child-of$<i>2<i>4<s>2<s>1<s>3|>:child-of$<i>3<s>2<s>4<s>2|>:child-of$<i>4<i>2<i>7<s>1<s>3<s>4|<:child-of$<i>4<b>0<i>3<s>3<s>3<s>1|<:child-of$<i>4<b>0<i>4<s>4<s>3<s>1|>:child-of$<i>7<i>1<i>7<s>2<s>4<s>2|<:child-of$<i>7<i>2<i>4<s>5<s>4<s>3|<:child-of$<i>7<i>4<i>7<s>6<s>4<s>2]', 'Check sorted relations');
+# 2 -> 2-4
+# >:child-of$<i>2<i>4<s>2<s>1<s>3
+# 2 -> 3
+# >:child-of$<i>3<s>2<s>4<s>2
+# 2-4 -> 2-7
+# >:child-of$<i>4<i>2<i>7<s>1<s>3<s>4
+# 2-4 -> 3
+# <:child-of$<i>4<b>0<i>3<s>3<s>3<s>1
+# 2-4 -> 4
+# <:child-of$<i>4<b>0<i>4<s>4<s>3<s>1
+# 2-7 -> 1-7
+# >:child-of$<i>7<i>1<i>7<s>2<s>4<s>2
+# 2-7 -> 2-4
+# <:child-of$<i>7<i>2<i>4<s>5<s>4<s>3
+# 2-7 -> 4-7
+# <:child-of$<i>7<i>4<i>7<s>6<s>4<s>2
+
+done_testing;
+
+
+__END__
+
diff --git a/t/xip/constituency.xml b/t/xip/constituency.xml
new file mode 100644
index 0000000..d36678f
--- /dev/null
+++ b/t/xip/constituency.xml
@@ -0,0 +1,534 @@
+<?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="GOE_AGA.03828" version="KorAP-0.4">
+   <spanList>
+      <span id="s1_n1" from="0" to="254">
+         <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="254">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">S</f>
+         </fs>
+         <rel label="dominates" target="s1_n3"/>
+         <rel label="dominates" uri="morpho.xml#s1_n35"/>
+         <rel label="dominates" target="s1_n37"/>
+         <rel label="dominates" uri="morpho.xml#s1_n43"/>
+         <rel label="dominates" target="s1_n45"/>
+         <rel label="dominates" uri="morpho.xml#s1_n130"/>
+      </span>
+      <span id="s1_n3" from="0" to="58">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PP</f>
+         </fs>
+         <rel label="dominates" target="s1_n4"/>
+      </span>
+      <span id="s1_n4" from="0" to="58">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">S</f>
+         </fs>
+         <rel label="dominates" target="s1_n5"/>
+         <rel label="dominates" target="s1_n23"/>
+      </span>
+      <span id="s1_n5" from="0" to="50">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PP</f>
+         </fs>
+         <rel label="dominates" target="s1_n6"/>
+      </span>
+      <span id="s1_n6" from="0" to="50">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">S</f>
+         </fs>
+         <rel label="dominates" target="s1_n7"/>
+         <rel label="dominates" target="s1_n13"/>
+      </span>
+      <span id="s1_n7" from="0" to="17">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" target="s1_n8"/>
+      </span>
+      <span id="s1_n8" from="0" to="17">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">CNP</f>
+         </fs>
+         <rel label="dominates" target="s1_n9"/>
+      </span>
+      <span id="s1_n9" from="0" to="17">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" target="s1_n10"/>
+      </span>
+      <span id="s1_n10" from="0" to="17">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">AP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n11"/>
+      </span>
+      <span id="s1_n11" from="0" to="17">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADJA</f>
+         </fs>
+      </span>
+      <span id="s1_n13" from="18" to="50">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" target="s1_n14"/>
+      </span>
+      <span id="s1_n14" from="18" to="50">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">CNP</f>
+         </fs>
+         <rel label="dominates" target="s1_n15"/>
+      </span>
+      <span id="s1_n15" from="18" to="50">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" target="s1_n16"/>
+         <rel label="dominates" uri="morpho.xml#s1_n21"/>
+      </span>
+      <span id="s1_n16" from="18" to="48">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">AP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n17"/>
+         <rel label="dominates" uri="morpho.xml#s1_n19"/>
+      </span>
+      <span id="s1_n17" from="18" to="30">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADJA</f>
+         </fs>
+      </span>
+      <span id="s1_n19" from="31" to="48">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s1_n21" from="49" to="50">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">TRUNC</f>
+         </fs>
+      </span>
+      <span id="s1_n23" from="50" to="58">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP-SB</f>
+         </fs>
+         <rel label="dominates" target="s1_n24"/>
+      </span>
+      <span id="s1_n24" from="50" to="58">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">CS</f>
+         </fs>
+         <rel label="dominates" target="s1_n25"/>
+      </span>
+      <span id="s1_n25" from="50" to="58">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">S</f>
+         </fs>
+         <rel label="dominates" target="s1_n26"/>
+         <rel label="dominates" target="s1_n32"/>
+      </span>
+      <span id="s1_n26" from="50" to="52">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">CNP-SB</f>
+         </fs>
+         <rel label="dominates" target="s1_n27"/>
+      </span>
+      <span id="s1_n27" from="50" to="52">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n28"/>
+         <rel label="dominates" uri="morpho.xml#s1_n30"/>
+      </span>
+      <span id="s1_n28" from="50" to="51">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">CARD</f>
+         </fs>
+      </span>
+      <span id="s1_n30" from="51" to="52">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">TRUNC</f>
+         </fs>
+      </span>
+      <span id="s1_n32" from="53" to="58">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP-OA</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n33"/>
+      </span>
+      <span id="s1_n33" from="53" to="58">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADV</f>
+         </fs>
+      </span>
+      <span id="s1_n35" from="59" to="60">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">XY</f>
+         </fs>
+      </span>
+      <span id="s1_n37" from="61" to="66">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP-SB</f>
+         </fs>
+         <rel label="dominates" target="s1_n38"/>
+      </span>
+      <span id="s1_n38" from="61" to="66">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">CS</f>
+         </fs>
+         <rel label="dominates" target="s1_n39"/>
+      </span>
+      <span id="s1_n39" from="61" to="66">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">S</f>
+         </fs>
+         <rel label="dominates" target="s1_n40"/>
+      </span>
+      <span id="s1_n40" from="61" to="66">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">VP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n41"/>
+      </span>
+      <span id="s1_n41" from="61" to="66">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADJD</f>
+         </fs>
+      </span>
+      <span id="s1_n43" from="66" to="67">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">$,</f>
+         </fs>
+      </span>
+      <span id="s1_n45" from="68" to="253">
+         <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_n46"/>
+         <rel label="dominates" target="s1_n48"/>
+         <rel label="dominates" uri="morpho.xml#s1_n122"/>
+         <rel label="dominates" uri="morpho.xml#s1_n124"/>
+         <rel label="dominates" uri="morpho.xml#s1_n126"/>
+         <rel label="dominates" uri="morpho.xml#s1_n128"/>
+      </span>
+      <span id="s1_n46" from="68" to="72">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">APPR</f>
+         </fs>
+      </span>
+      <span id="s1_n48" from="73" to="218">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">AP</f>
+         </fs>
+         <rel label="dominates" target="s1_n49"/>
+         <rel label="dominates" uri="morpho.xml#s1_n120"/>
+      </span>
+      <span id="s1_n49" from="73" to="213">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">AVP</f>
+         </fs>
+         <rel label="dominates" target="s1_n50"/>
+      </span>
+      <span id="s1_n50" from="73" to="213">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">S</f>
+         </fs>
+         <rel label="dominates" target="s1_n51"/>
+         <rel label="dominates" uri="morpho.xml#s1_n69"/>
+         <rel label="dominates" target="s1_n71"/>
+         <rel label="dominates" target="s1_n117"/>
+      </span>
+      <span id="s1_n51" from="73" to="127">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP-SB</f>
+         </fs>
+         <rel label="dominates" target="s1_n52"/>
+      </span>
+      <span id="s1_n52" from="73" to="127">
+         <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_n53"/>
+         <rel label="dominates" uri="morpho.xml#s1_n55"/>
+         <rel label="dominates" target="s1_n57"/>
+      </span>
+      <span id="s1_n53" from="73" to="78">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">TRUNC</f>
+         </fs>
+      </span>
+      <span id="s1_n55" from="79" to="82">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">KON</f>
+         </fs>
+      </span>
+      <span id="s1_n57" from="83" to="127">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" target="s1_n58"/>
+         <rel label="dominates" uri="morpho.xml#s1_n65"/>
+         <rel label="dominates" uri="morpho.xml#s1_n67"/>
+      </span>
+      <span id="s1_n58" from="83" to="102">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">MPN</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n59"/>
+         <rel label="dominates" uri="morpho.xml#s1_n61"/>
+         <rel label="dominates" uri="morpho.xml#s1_n63"/>
+      </span>
+      <span id="s1_n59" from="83" to="85">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">FM</f>
+         </fs>
+      </span>
+      <span id="s1_n61" from="86" to="88">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">FM</f>
+         </fs>
+      </span>
+      <span id="s1_n63" from="89" to="102">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">FM</f>
+         </fs>
+      </span>
+      <span id="s1_n65" from="103" to="113">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADJA</f>
+         </fs>
+      </span>
+      <span id="s1_n67" from="114" to="127">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s1_n69" from="128" to="133">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">VVFIN</f>
+         </fs>
+      </span>
+      <span id="s1_n71" from="134" to="208">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">AVP</f>
+         </fs>
+         <rel label="dominates" target="s1_n72"/>
+      </span>
+      <span id="s1_n72" from="134" to="208">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">S</f>
+         </fs>
+         <rel label="dominates" target="s1_n73"/>
+         <rel label="dominates" uri="morpho.xml#s1_n93"/>
+         <rel label="dominates" target="s1_n95"/>
+      </span>
+      <span id="s1_n73" from="134" to="179">
+         <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#s1_n74"/>
+         <rel label="dominates" target="s1_n76"/>
+      </span>
+      <span id="s1_n74" from="134" to="137">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ART</f>
+         </fs>
+      </span>
+      <span id="s1_n76" from="138" to="179">
+         <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_n77"/>
+         <rel label="dominates" uri="morpho.xml#s1_n79"/>
+         <rel label="dominates" target="s1_n81"/>
+         <rel label="dominates" uri="morpho.xml#s1_n91"/>
+      </span>
+      <span id="s1_n77" from="138" to="149">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s1_n79" from="150" to="153">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">KON</f>
+         </fs>
+      </span>
+      <span id="s1_n81" from="154" to="178">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n82"/>
+         <rel label="dominates" uri="morpho.xml#s1_n84"/>
+         <rel label="dominates" target="s1_n86"/>
+      </span>
+      <span id="s1_n82" from="154" to="157">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ART</f>
+         </fs>
+      </span>
+      <span id="s1_n84" from="158" to="162">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s1_n86" from="163" to="178">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n87"/>
+         <rel label="dominates" uri="morpho.xml#s1_n89"/>
+      </span>
+      <span id="s1_n87" from="163" to="169">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PPOSAT</f>
+         </fs>
+      </span>
+      <span id="s1_n89" from="170" to="178">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s1_n91" from="178" to="179">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">$.</f>
+         </fs>
+      </span>
+      <span id="s1_n93" from="180" to="183">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">VAFIN</f>
+         </fs>
+      </span>
+      <span id="s1_n95" from="184" to="208">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n96"/>
+         <rel label="dominates" target="s1_n98"/>
+      </span>
+      <span id="s1_n96" from="184" to="187">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PIS</f>
+         </fs>
+      </span>
+      <span id="s1_n98" from="188" to="208">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n99"/>
+         <rel label="dominates" target="s1_n101"/>
+      </span>
+      <span id="s1_n99" from="188" to="191">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ART</f>
+         </fs>
+      </span>
+      <span id="s1_n101" from="192" to="208">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">CNP</f>
+         </fs>
+         <rel label="dominates" target="s1_n102"/>
+         <rel label="dominates" uri="morpho.xml#s1_n107"/>
+         <rel label="dominates" target="s1_n109"/>
+         <rel label="dominates" target="s1_n112"/>
+      </span>
+      <span id="s1_n102" from="192" to="198">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n103"/>
+         <rel label="dominates" uri="morpho.xml#s1_n105"/>
+      </span>
+      <span id="s1_n103" from="192" to="196">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">APPR</f>
+         </fs>
+      </span>
+      <span id="s1_n105" from="197" to="198">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">XY</f>
+         </fs>
+      </span>
+      <span id="s1_n107" from="198" to="199">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">$,</f>
+         </fs>
+      </span>
+      <span id="s1_n109" from="200" to="202">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">AVP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n110"/>
+      </span>
+      <span id="s1_n110" from="200" to="202">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADV</f>
+         </fs>
+      </span>
+      <span id="s1_n112" from="203" to="208">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n113"/>
+         <rel label="dominates" uri="morpho.xml#s1_n115"/>
+      </span>
+      <span id="s1_n113" from="203" to="204">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">XY</f>
+         </fs>
+      </span>
+      <span id="s1_n115" from="205" to="208">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">XY</f>
+         </fs>
+      </span>
+      <span id="s1_n117" from="209" to="213">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NP-DA</f>
+         </fs>
+         <rel label="dominates" uri="morpho.xml#s1_n118"/>
+      </span>
+      <span id="s1_n118" from="209" to="213">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PRF</f>
+         </fs>
+      </span>
+      <span id="s1_n120" from="214" to="218">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">PIDAT</f>
+         </fs>
+      </span>
+      <span id="s1_n122" from="220" to="226">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADJA</f>
+         </fs>
+      </span>
+      <span id="s1_n124" from="227" to="240">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">ADJA</f>
+         </fs>
+      </span>
+      <span id="s1_n126" from="241" to="249">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">NN</f>
+         </fs>
+      </span>
+      <span id="s1_n128" from="250" to="253">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">XY</f>
+         </fs>
+      </span>
+      <span id="s1_n130" from="253" to="254">
+         <fs xmlns="http://www.tei-c.org/ns/1.0" type="node">
+            <f name="const">$.</f>
+         </fs>
+      </span>
+   </spanList>
+</layer>