NAME

Catmandu::Fix::Bind::pica_each - a binder that loops over PICA fields

SYNOPSIS

# Only add field 039D subfield $9 to the editions when the subfield $a 
contains a 'E-Paper'
do pica_each()
    if pica_match("039Da","E-Paper")
        pica_map("039D9",editions.$append)
    end
end

# Delete all the 041A subject fields
do pica_each()
    if pica_match("041A",".*")
        reject()
    end
end

do pica_each("0...")
    # process only level 0 fields
end

DESCRIPTION

The pica_each binder will iterate over each individual PICA field and execute the fixes only in context over each individual field. The current field is bound to record.0.

If a PICA record contains:

041A    $9040073580$8Bodenbiologie
041A    $9040674886$8Zeitschrift 

then the fix

do pica_each()
    pica_map("041A8",subject.$append)
end

will have the same effect as

pica_map("041A8",subject.$append)

because pica_map by default loops over all repeated PICA fields. But the pica_each bind has the advantage to process fields in context. E.g. to only map fields where the subfield $8 doesn't contain 'Miscellaneous' you can write:

do pica_each()
    unless pica_match("041A8","Miscellaneous")
        pica_map("041A8",subject.$append)
    end
end

SEE ALSO

Catmandu::Fix::Bind