First, determine which format you’d like to receive data in. To see the available formats for bibliographic records, visit

http://<hostname>/opac/extras/supercat/formats/record

Similarly, authority record formats can be found at http://libcat.linnbenton.edu/opac/extras/supercat/formats/authority and metarecord formats can be found at http://libcat.linnbenton.edu/opac/extras/supercat/formats/metarecord

For example, http://gapines.org/opac/extras/supercat/formats/authority shows that the Georgia Pines catalog can return authority records in the formats opac, marc21, marc21-full, and marc21-uris. Supercat also includes the MIME type of each format, and sometimes also refers to the documentation for a particular format.

<?xml version='1.0' encoding='UTF-8' ?>
<formats>
  <format>
    <name>opac</name>
    <type>text/html</type>
  </format>
  <format>
    <name>marc21</name>
    <type>application/xml</type>
    <docs>http://www.loc.gov/marc/</docs>
  </format>
  <format>
    <name>marc21-full</name>
    <type>application/xml</type>
    <docs>http://www.loc.gov/marc/</docs>
  </format>
  <format>
    <name>marc21-uris</name>
    <type>application/xml</type>
    <docs>http://www.loc.gov/marc/</docs>
  </format>
</formats>