Make it possible to search for records lacking a MARC field in Create Lists
I recently wanted to run a search for all records that matched certain criteria and did not have an 856 field. However, Create Lists does not currently have a "lacks field" option. It would be very helpful to be able to search for records that do not have certain fields.

The product team will review this idea for consideration for a future release.
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Lloyd Chittenden commented
It is also possible to do this with a JSON like this:
{
"target": {
"record": {
"type": "bib"
},
"field": {
"marcTag": "020"
}
},
"expr": {
"op": "not_exists",
"operands": [
"",
""
]
}
}But come on, the system can clearly do this. It should be easily available in the interface.
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Greg Smith commented
Having a more obvious, built-in feature for this kind of search would probably be more user-friendly than the method that is currently required.
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KTSUDA commented
You should be able to search bib records that lack the 856 field by the criteria below:
BIBLIOGRAPHIC MARC Tag 856 equal to ""
b !856 = <blank>
(Edited by admin)