Arguments

ename  (classic entity name) object or entity ename to query for the given property
property  (string) the name of the property to test; property name is always case-insensitive

Return

T if the property is read-only, NIL if the property can be changed

Example

(ispropertyreadonly  (entlast)  "LayerId")  0
(ispropertyreadonly  (entlast)  "LayerId~Native")  0

(ispropertyreadonly  (entlast)  "BlockId")  1
(ispropertyreadonly  (entlast)  "BlockId~Native")  1

Hint

the specified "ident" can be used to uniquely specify the property, as same-named properties can exist in multiple contexts;
the ident always uses the format "Name~Context"

Remarks

there are a few properties, which are write-enabled in BricsCAD, while read-only under AutoLISP