The ASGUID keyword populates a property with the value of “GUID” property, It can be used only with text properties. The text property can then be used as a key property instead of the actual GUID property. The ASGUID property should be read only. When you re-open the definition, the ASGUID property is filled in.
Example
The following example indicates that the new definition “MyDef” will show the dialog Dictionary Object: MyDef. The property “MyProp” becomes read‑only, and is populated with the GUID of the definition.
RENAME DEFINITION "User 1" to "MyDef" DEFINITION "MyDef" { PROPERTY "MyProp" { KEY EDIT Text LENGTH 100 ASGUID READONLY} Property "HIYA" {EDIT Text Length 145} }