change copyrights owner attribute to @rest, with a comment to explain

grobid-core/src/main/java/org/grobid/core/document/TEIFormatter.java

@@ -264,22 +264,32 @@ public StringBuilder toTEIHeader(BiblioItem biblio,
  }
 
  // We introduce something more meaningful with TEI customization to encode copyrights information:
- // - @copyrightsOwner with value "publisher", "authors", "unknown"
+ // - @resp with value "publisher", "authors", "unknown", we add a comment to clarify that @resp
+ // should be interpreted as the copyrights owner
  // - license related to copyrights exception is encoded via <licence> 
  // (note: I have no clue what can mean "free" as status for a document - there are always some sort of 
  // restrictions like moral rights even for public domain documents)
  if (copyrightsLicense != null) {
  tei.append("\t\t\t\t<availability ");
 
+ boolean addCopyrightsComment = false;
  if (copyrightsLicense.getCopyrightsOwner() != null) {
- tei.append("copyrightsOwner=\""+ copyrightsLicense.getCopyrightsOwner().getName() +"\" ");
+ tei.append("resp=\""+ copyrightsLicense.getCopyrightsOwner().getName() +"\" ");
+ addCopyrightsComment = true;
  }
 
  if (copyrightsLicense.getLicense() != null && copyrightsLicense.getLicense() != License.UNDECIDED) {
- tei.append("status=\"restricted\">");
- tei.append("<licence>"+copyrightsLicense.getLicense().getName()+"</licence>");
+ tei.append("status=\"restricted\">\n");
+ if (addCopyrightsComment) {
+ tei.append("\t\t\t\t\t<!-- the @rest attribute above gives the document copyrights owner (publisher, authors), if known -->\n");
+ }
+ tei.append("\t\t\t\t\t<licence>"+copyrightsLicense.getLicense().getName()+"</licence>\n");
  } else {
- tei.append(" status=\"unknown\"><licence/>");
+ tei.append(" status=\"unknown\">\n");
+ if (addCopyrightsComment) {
+ tei.append("\t\t\t\t\t<!-- the @rest attribute above gives the document copyrights owner (publisher, authors), if known -->\n");
+ }
+ tei.append("\t\t\t\t\t<licence/>\n");
  }
 
  /*tei.append("<p>Copyright ");