ALCON I'm having difficulty parsing an input ASCII file containing optional records as follows:
*Required line 1... fixed length <CR><LF>Required line 2... fixed length <CR><LF> Optional line 3... fixed length <CR><LF> Optional comment... 1 of n <CR><LF> Optional comment... 2 of n <CR><LF> Optional comment... n of n <CR><LF> Required line 4... fixed length <CR><LF> :::* I've tried various <xs:choice ... /> and lookahead approaches unsuccessfully and admittedly getting frustrated. <8( For example, I'm able to parse 'Optional line 3' *when it exists* BUT I can't construct DFDL script to process the file successfully when line 3 is not present. Can someone pls point me to an example/link illustrating best way to process this if/when optional lines are NOT present. Thx in advance Attila
