Allow the MARC field that the _id comes from to be a subfield

LibreCat / Catmandu-MARC

Catmandu modules for working with MARC data

https://metacpan.org/release/Catmandu-MARC

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Allow the MARC field that the _id comes from to be a subfield #3

Closed eythian closed 10 years ago

eythian commented 10 years ago

An _id can be sourced from a control field, or from NNN subfield a. This allows the id parameter provided to be in the form NNNb, where it will get the ID from subfield b of field NNN.