marc21

A Go MARC21 implementation.

This repository started as a fork of gitorious.org/marc21-go/marc21, but is - as of June 2017 - the new home of the MARC21 Go library.

As of August 2019, we are working on a revised implementation, as there are some edge cases the current implementation cannot handle.

Usage

file, _ := os.Open("somedata.mrc")
record, _ := marc21.ReadRecord(file)
_ = record.WriteTo(os.Stdout)

More examples

A simple example.

package main

import (
	"io"
	"log"
	"os"

	"github.com/miku/marc21"
)

func main() {
	for {
		r, err := marc21.ReadRecord(os.Stdin)
		if err == io.EOF {
			break
		}
		if err != nil {
			log.Fatal(err)
		}
		if _, err := r.WriteTo(os.Stdout); err != nil {
			log.Fatal(err)
		}
	}
}

$ cat fixtures/sandburg.mrc | go run examples/simple.go | xmllint --format -
<?xml version="1.0"?>
<collection>
  <record>
    <leader>01142cam  2200301 a 4500</leader>
    <controlfield tag="001">   92005291 </controlfield>
    <controlfield tag="003">DLC</controlfield>
    <controlfield tag="005">19930521155141.9</controlfield>
    <controlfield tag="008">920219s1993    caua   j      000 0 eng  </controlfield>
    <datafield tag="010" ind1=" " ind2=" ">
      <subfield code="a">   92005291 </subfield>
    </datafield>
    <datafield tag="020" ind1=" " ind2=" ">
      <subfield code="a">0152038655 :</subfield>
      <subfield code="c">$15.95</subfield>
    </datafield>
    <datafield tag="040" ind1=" " ind2=" ">
      <subfield code="a">DLC</subfield>
      <subfield code="c">DLC</subfield>
      <subfield code="d">DLC</subfield>
    </datafield>
    <datafield tag="042" ind1=" " ind2=" ">
      <subfield code="a">lcac</subfield>
    </datafield>
    <datafield tag="050" ind1="0" ind2="0">
      <subfield code="a">PS3537.A618</subfield>
      <subfield code="b">A88 1993</subfield>
    </datafield>
    <datafield tag="082" ind1="0" ind2="0">
      <subfield code="a">811/.52</subfield>
      <subfield code="2">20</subfield>
    </datafield>
    <datafield tag="100" ind1="1" ind2=" ">
      <subfield code="a">Sandburg, Carl,</subfield>
      <subfield code="d">1878-1967.</subfield>
    </datafield>
    <datafield tag="245" ind1="1" ind2="0">
      <subfield code="a">Arithmetic /</subfield>
      <subfield code="c">Carl Sandburg ; illustrated as an anamorphic adventure by Ted Rand.</subfield>
    </datafield>
    <datafield tag="250" ind1=" " ind2=" ">
      <subfield code="a">1st ed.</subfield>
    </datafield>
    <datafield tag="260" ind1=" " ind2=" ">
      <subfield code="a">San Diego :</subfield>
      <subfield code="b">Harcourt Brace Jovanovich,</subfield>
      <subfield code="c">c1993.</subfield>
    </datafield>
    <datafield tag="300" ind1=" " ind2=" ">
      <subfield code="a">1 v. (unpaged) :</subfield>
      <subfield code="b">ill. (some col.) ;</subfield>
      <subfield code="c">26 cm.</subfield>
    </datafield>
    <datafield tag="500" ind1=" " ind2=" ">
      <subfield code="a">One Mylar sheet included in pocket.</subfield>
    </datafield>
    <datafield tag="520" ind1=" " ind2=" ">
      <subfield code="a">A poem about numbers and their characteristics ... </subfield>
    </datafield>
    <datafield tag="650" ind1=" " ind2="0">
      <subfield code="a">Arithmetic</subfield>
      <subfield code="x">Juvenile poetry.</subfield>
    </datafield>
    <datafield tag="650" ind1=" " ind2="0">
      <subfield code="a">Children's poetry, American.</subfield>
    </datafield>
    <datafield tag="650" ind1=" " ind2="1">
      <subfield code="a">Arithmetic</subfield>
      <subfield code="x">Poetry.</subfield>
    </datafield>
    <datafield tag="650" ind1=" " ind2="1">
      <subfield code="a">American poetry.</subfield>
    </datafield>
    <datafield tag="650" ind1=" " ind2="1">
      <subfield code="a">Visual perception.</subfield>
    </datafield>
    <datafield tag="700" ind1="1" ind2=" ">
      <subfield code="a">Rand, Ted,</subfield>
      <subfield code="e">ill.</subfield>
    </datafield>
  </record>
</collection>