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+--- Thread: Using tagupdate file (/showthread.php?tid=6504)
Using tagupdate file - stefano_mbp - 21-01-2022 11:13
Hi Simon
I would like to define in tagupdate file a condition to change the content of a tag.
The rule should be
@STYLE=Concerto
&ORCHESTRA=
=STYLE=Concerto - Chamber Music
where the content of Orchestra is blank (empty)
but it doesn’t seem possible as the rule is ignored even trying to set
ORCHESTRA=‘ ‘
Is there something that can be done or is it just impossible?
Thanks
RE: Using tagupdate file - simoncn - 21-01-2022 12:18
The main issue with supporting this is that it would create an undesirable inconsistency between @ and & (it is not possible to support this for @). Also, supporting this for & would prequire special parsing and handling of every & line for every file with an @ match, which would slow down scanning.
A simple solution is to use the tagValue 'default' option to add a default literal value and use this default value in the & line (or in @ if desired).
Edit: The above suggestion doesn't work. See the following dscussion.
RE: Using tagupdate file - stefano_mbp - 21-01-2022 14:51
Following your suggestion I could assign a default value to Orchestra (x) defining in tagValue property
Orchestra.default={Orchestra, ‘x’}
but the rule
@STYLE=Concerto
&ORCHESTRA=x
=STYLE=Concerto - Chamber Music
doesn’t still work.
Could it be that the tagupdate file is processed before the tagupdate property?
RE: Using tagupdate file - simoncn - 21-01-2022 20:47
You are correct that tagUpdate processing happens before tagValue processing, so my suggestion doesn't work.
FYI, there is no need for the second Orchestra in
Orchestra.default={Orchestra, ‘x’}
This can be written more simply as
Orchestra.default={‘x’}
because the 'default' option is processed only when the Orchestra tag is omitted.
RE: Using tagupdate file - stefano_mbp - 21-01-2022 21:18
I noted your suggestion and thanks for confirming my assumption