## OleFormat.is_link property Returns ``True`` if the OLE object is linked (when [OleFormat.source_full_name](../source_full_name/) is specified). ```python @property def is_link(self) -> bool: .........DocumentBuilder(doc=doc) # Embed a Microsoft Visio drawing into the document...insert_ole_object(file_name=IMAGE_DIR + 'Microsoft Visio drawing.vsd', prog_id='Package'...