AMT Datasouth PAL - Manual (Page 198)

undef
192
undef
Description
Removes an entry from a dictionary.
Usage
DictAny KeyAny undef
DictAny Dictionary. Specifies the dictionary from which PAL should remove the entry.
KeyAny Any. Specifies the key within the dictionary of the entry which PAL should
remove.
Comments
PAL permits the selective deletion of entries within dictionaries. Given the dictionary and the key
for an entry within the dictionary, the undef operator will delete the specified entry.
The programmer can use the undef operator in combination with the userdict operator to undefine
objects previously defined using the def operator. See the userdict discussion for details.
PAL does not generate an error if KeyAny does not exist in the specified dictionary.