Validation in MARC tags with multiple subfields

[jenniferward]

Just noticed that some people are filling out 856 $z and $x even if there is no URL in $u. So we need a validation that looks at the whole field - if 1 subfield is filled out, then all 3 need to be filled out.

[jenniferward]

Editing this to include more fields that have subfields. Catalogers sometimes fill out a function (700$4, 710$4) or a literature reference (690$n, 691$n) but forget the person or book, and they would appreciate a warning here so that they can fix it.

So:
700:
If $j or $4 is filled out, then $a required

710:
If $j or $4 is filled out, then $a required

690:
If $n filled out, then $a required
If $a filled out, then $n required

691:
If $n filled out, then $a required
BUT: 691$a can exist by itself (sometimes $n is not necessary)

510:
If $c is filled out, then $a is required
If $a is filled out, then $c is required

596:
If $a is filled out, then $b is required
If $b is filled out, then $a is required

[xhero]

For 700 and 710 I cannot reproduce the bug, as leaving $a empty will always trigger an error for me - is there a special way this is done?

[jenniferward]

I was thinking of the error reports that had the empty $a. Maybe it was only in old records. You're right, I'm getting errors (as expected) too.

[jenniferward]

Was this implemented, or is it yet to come? We had an empty 856$u recently (https://muscat.rism.info/admin/sources/1001171784).

[xhero]

Oh, I realized I implemented all of them except 856$u

[xhero]

I will move this to 8.1, the problem is that a field can be validated only by one rule, and 856 $u already has a begins_with rule.

[jenniferward]

Giving this a boost because there are also some records where just one subfield in 856 is filled out, likely just through misclicking.
856 containing only $x:

• https://muscat-test.rism.info/admin/sources/1001274006 : EXTERNAL RESOURCE [unset] [Other] (MS, unpublished)
• https://muscat-test.rism.info/admin/sources/1001159579 EXTERNAL RESOURCE [unset] [Digitized] (SUB)
• https://muscat-test.rism.info/admin/sources/1001274004#holding_51063109 (fake example, also has solo $z)

The validation should catch such cases and we should add it to the health report. We'd also need a list of 856s missing multiple fields so we can fix them.

[jenniferward]

Also relevant: People: Validation for 024 #1498