DRAW Reference Manual
Labels
:
Autotag
: Modify Tag Rule
Modify Tag Rule
TRLB, TRST and TAGR elements can be modified in the usual way by changing their attribute settings (although with TRLB and TRST elements only the standard attributes, for example, Name, are settable). Note, however, that modifying these elements can cause existing Labels to no longer represent the TAGR definition.
If a TAGR owned by a LAYE is deleted or included in another LAYE then the SORF attribute of all labels generated from it is set to Nulref. It is not feasible for TAGRs owned by TRSTs (because many labels in several databases can be affected) or to set to Nulref SORF attributes for any other changes to TAGRs (because a change can broaden the scope of the TAGR so that existing Labels are still valid). If changes are made to a TAGR or TRST that potentially cause database inconsistencies then a warning message is output.
If a TAGR’s TMRF attribute is changed then, at the next UPDATE TAGG command, an implicit UPDATE TAGGING OVERWRITE operation is performed, which makes sure that the correct appearance of existing labels is maintained. If the TMRF is changed from one TXTM or SYTM to another TXTM or SYTM then existing label modifications are kept. If the TMRF is changed in a different way (for example, GLAB to GLAB or SYTM to SLAB) then existing Label modifications are lost.
1974 to current year.
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