marc-record-js

MARC record implementation in javascript

Installation

npm install marc-record-js

Usage

The tests contains multiple examples on how to use the module.

var Record = require('marc-record-js');

Creating a record

// Create empty record
var myRecord = new Record();

// You can also make a record from string representation
var myRecord = Record.fromString(recordString);

recordString can be obtained with toString() function.

myRecord.toString()

The output of toString() is human-readable. Example:

LDR    leader
001    28474
100    ‡aExample Author
245 0  ‡aExample Title
500 #  ‡aNote‡bSecond subfield

Mutating record

// set record leader
myRecord.setLeader("00000cam^a22001817i^4500");

// insert controlfields to the record. Proper ordering is handled automatically.
myRecord.insertControlField({
    tag: "001"
    value: "007045872"
});

// or using array as a parameter
myRecord.insertControlField(["001", "007045872"]});

// There is also appendControlField, which will append a controlfield to the end of the record.

// insert datafields to the record. Proper ordering is handled automatically.
myRecord.appendField({
    tag: "245",
    ind1: "",
    ind2: "",
    subfields: [
        {
            code: "a"
            value: "The title of the book"
        },
        {
            code: "c",
            value: "Some author"
        }
    ]
});

// or using array as a parameter
// Format is [tag,ind1,ind2,sub1code,sub1value,sub2code,sub2value,...subNcode,subNvalue]
myRecord.insertField(["245","","", "a","The title of the book'","b","Some author"]});

Getters

Get array of controlfields:

myRecord.getControlfields();

Get array of datafields:

myRecord.getDatafields();

Record object has an attribute called fields which contains an array of it's fields:

myRecord.fields

Check if record is deleted:

myRecord.isDeleted()

Cloning a record

A deep copy of the record can be made by passing the fields from a record to the constructor of new record:

var deepClonedRecord = Record.clone(myRecord);

Record equality check

Record.isEqual(record1, record2); // true if records are deeply equal.

Alternative form for equality comparison:

record1.equalsTo(record2);

Simple assertions

Check if record contains a data field with specific value

record.containsFieldWithValue('245', 'b', 'Test field', 'c', 'Test content')

Check if record contains a control field with specific value

record.containsFieldWithValue('003', 'some value')

See also

To serialize marc records to other formats, see marc-record-serializers