Merge MARC records

Merge MARC records

Usage

COPY

Chosing fields for reducer:

const copyReducerConfigs = [
    {tagPattern: /010/u},
    {tagPattern: /010|020/u},
    {tagPattern: new RegExp('010', 'u')},
    {tagPattern: new RegExp(String((/^(?<tags1>010|020$)/u').source))},
  ]

compareTagsOnly (Defaults false)

{tagPattern: /010/u, compareTagsOnly: false}

If base has field with that tag source field is ignored

doNotCopyIfFieldPresent (Defaults false)

{tagPattern: /010/u, doNotCopyIfFieldPresent: "^011$"}

If base has field with that tag 011 source field is ignored

compareWithoutIndicators (Defaults false)

{tagPattern: /010/u, compareWithoutIndicators: false}

When base and source fields are compared, indicator differences are ignored

compareWithoutTag (Defaults false)

{tagPattern: /^(100|700)$/u, compareWithoutTag: false}
{tagPattern: /^(100|700)$/u, compareWithoutTag: false, swapTag: [{"from": "^100$", "to": "700"}]}

When base and source fields are compared, tag differences are ignored

subfieldsMustBeIdentical (Defaults true)

{tagPattern: /010/u, subfieldsMustBeIdentical: true}

If source subfields are subset of base subfields this option says if it is copied

subfieldsMustBeIdentical	base	source	copy
true or false	$a foo	$a foo	false
true or false	$a foo	$b bar	true
true	$a foo	$a foo,$b bar	true
false	$a foo	$a foo,$b bar	true
true	$a foo,$b bar	$a foo	true
false	$a foo,$b bar	$a foo	false

excludeSubfields (Defaults [ ])

{tagPattern: /010/u, excludeSubfields: ['a']}

When base and source fields are compared, excluded subfields are ignored

swapTag (Defaults [ ])

{tagPattern: /^100$/u, swapTag: [{"from": "^100$", "to": "700"}]}
{tagPattern: /^(100|700)$/u, compareWithoutTag: false, swapTag: [{"from": "^100$", "to": "700"}]}

When fields are copied, tags are swapped. From is Regexp filter and to is string value.

swapSubfieldCode (Defaults [ ])

{tagPattern: /010/u, swapSubfieldCode: [{"from": "a", "to": "b"}]}

When source fields are copied, subfields are checkked and if subfield.code match to 'from' value is that code swapped to 'to' value

dropSubfields (Defaults [ ])

{tagPattern: /010/u, dropSubfields: [{"code": "9"}]}

Drops subfields 9's from all fields tagged 010

{tagPattern: /010/u, dropSubfields: [{"code": "9", "value": "FENNI<KEEP>"}]}

Drops subfields 9's that have "FENNI" from all fields tagged 010

{tagPattern: /010/u, dropSubfields: [{"code": "9", "condition": "unless", "value": "^FENNI<(?<option>KEEP|DROP)>$"}]}

Drops all subfield 9's unless they have "FENNI" or "FENNI" from all fields tagged 010

When comparing or copying field dropped fields are ignored

copyUnless (Defaults [ ])

{tagPattern: /010/u, copyUnless: [{"code": "9", "value": "FENNI<KEEP>"}]}

When field is otherwise ok to be copied, if it contains given subfield whole field is ignored

baseValidators (Defaults {subfieldValues: false})

{tagPattern: /010/u, baseValidators: {fields: true, subfields: true, subfieldValues: true}}

Marc record validators for base record while reducer is working. More info can be read here: https://github.com/NatLibFi/marc-record-js

sourceValidators (Defaults {subfieldValues: false})

{tagPattern: /010/u, sourceValidators: {fields: true, subfields: true, subfieldValues: true}}

Marc record validators for source record while reducer is working. More info can be read here: https://github.com/NatLibFi/marc-record-js

License and copyright

Copyright (c) 2020-2024 University Of Helsinki (The National Library Of Finland)

This project's source code is licensed under the terms of MIT or any later version.