src/Pure/PIDE/document_id.scala
2013-07-05 wenzelm 2013-07-05 more uniform Counter in ML and Scala;
2013-07-05 wenzelm 2013-07-05 tuned signature;
2013-07-05 wenzelm 2013-07-05 explicit module Document_ID as source of globally unique identifiers across ML/Scala;