Entity name and handent

[Anonymous]

Hello, Community.

I confuse the relationship between entity name and handle.

I know that entity name (group code -1) resets when reopen drawing

Handle (group code 5) is fixed the own value.

However, handent lisp returns entity name base on a handle.

So I think that own handle value will be same as entity name even though reopen the drawing.

[_gile]

Hi,

The handle is a persistant identifier unique per document.

The ename (or ObjectId) is a non persistant identifier unique per session.

That means, in the same session of AutoCAD, each time you open or create a drawing (document) AutoCAD generates a new ObjectId  for each object in this document which is different from all already created ObjectId in the session.

In each document AutoCAD keeps a link between each handle and the corresponding ObjectId in this session.