This configuration element enables you to specify how non-standard fields should be mapped. It's most useful for describing individual targets' idiosyncratic uses of MARC fields, but can also be used to describe XML records.
You can specify any number of field mappings, one per line. Each line contains a selector, then whitespace, then the abstract fieldname that the data will be mapped to. The selector may either in one of two forms:
For example, a set of field maps might look like this:
999$c jtitle
999$d volume
999$e issue
/journal/dc:title jtitle
[In future we might extend the format of field-map configuration by allowing canned normalisations and/or aribtrary transformations to be specified after the abstract fieldname. These might be expressed either as normalisation names (trimSpace, trimArticle, etc.) or as regular-expression substitutions such as s/^The\s+//.]