+
+ # Return and register a new empty docunit
+ fun new_docunit: DocUnit
+ do
+ var mdoc = executor.mdoc
+ assert mdoc != null
+
+ var next_number = 0
+ var name = executor.xml_name
+ if executor.docunits.not_empty and executor.docunits.last.mdoc == mdoc then
+ next_number = executor.docunits.last.number + 1
+ name += "+" + next_number.to_s
+ end
+
+ var res = new DocUnit(mdoc, next_number, "", executor.xml_classname, name)
+ executor.docunits.add res
+ executor.toolcontext.modelbuilder.unit_entities += 1
+ return res
+ end