CHANGES.md

Adds a new setting to allow finer-grained control over which marc4j reader is used to process binary MARC.

traject uses a broadly permissive set of defaults to read binary MARC records, which may not always be what you want. The permissive setting sets the flag of the same name on the (https://github.com/marc4j/marc4j/blob/master/src/org/marc4j/MarcPermissiveStreamReader.java#L164)['permissive' reader class] provided by marc4j (which, at the time of writing, controls how that reader guesses the encoding of input records.

Use the "strict" org.marc4j.MarcStreamReader class to read MARC21

In situations where you want stricter record processing -- or in case your records can't be processed by the permissive stream reader (paradoxically, MarcStreamReader is more forgiving of certain non-standard MARC, e.g. uppercase subfields), you can specify that traject should use the org.marc4j.MarcStreamReader class:

settings do 
    provide 'marc4j_reader.class', 'MarcStreamReader'
end

A note about permissive

The marc4j_reader.permissive setting, which previously existed, is passed through to the constructor of the MarcPermissiveStreamReader class, and does not effect which class is used to read MARC21 input. If you set both this parameter and the marc4j_reader.class parameter, the permissive setting will be ignored.