Added Schreibgebrauch features

Change-Id: I2eb4f6b32007370985e2cf4168e00a95cbde4001
diff --git a/lib/KorAP/Document.pm b/lib/KorAP/Document.pm
index 2e3da2a..8aeec55 100644
--- a/lib/KorAP/Document.pm
+++ b/lib/KorAP/Document.pm
@@ -116,7 +116,7 @@
   # Get document id and corpus id
   if ($rt && $rt->{'-docid'}) {
     $self->text_sigle($rt->{'-docid'});
-    if ($self->text_sigle =~ /^(([^_]+)_[^\._]+?)\.\d+$/) {
+    if ($self->text_sigle =~ /^(([^_]+)_[^\._]+?)\..+?$/) {
       $self->corpus_sigle($2);
       $self->doc_sigle($1);
     }