Checking presence of subfield depending on indicator value

Description

We'd like Aleph to check and report, in a non-blocking way, the absence of subfield $$2 when second indicator of field 655 is a '7'.  We tried to do this via check_doc_doc, check_doc_mandatory, and check_doc_line, but it doesn't work.  (We get 'Tag 655 is missing a mandatory sub field "" '.) .

Resolution

There is no way to configure ALEPH to check a dependency between an indicator value and the presence of a specific subfield. The dependency check when using check_doc_line section "D" is only for sub-fields (and not indicators). 

A workaround would be: 

1)    Run ret-01 to retrieve all Bibs with a 655 tag with second indicator 7, specifying output file “list1” 
2)    Using “list1” as input, retrieve all those Bibs that have subfield $$2, with From text = A and To text = ZZZ. Output is “list2”. 
3)    diff list1 and list2 (ret-10). This will give you all the bibs that have 655 with second indicator 7 and no subfield $$2. 
 

• Article last edited: 3-Jan-2018