//! Adds a new sub-document by the identifier, or returns existing one if it is already exist
MODEL_EXPORT virtual boost::shared_ptr<ModelAPI_Document> subDocument(std::string theDocID);
+ //! Internal sub-document by ID
+ MODEL_EXPORT virtual boost::shared_ptr<Model_Document> subDoc(std::string theDocID);
+
///! Returns the id of hte document
MODEL_EXPORT virtual const std::string& id() const
{