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>

You can retrieve records using URLs in the following format:

http://<hostname>/opac/extras/supercat/retrieve/<format>/<record-type>/<record-ID>

For example, http://gapines.org/opac/extras/supercat/retrieve/mods/record/33333 returns the following record.

<?xml version="1.0"?>
<modsCollection xmlns="http://www.loc.gov/mods/" xmlns:mods="http://www.loc.gov/mods/" version="3.0">
  <mods xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mods="http://www.loc.gov/mods/" xsi:schemaLocation="http://www.loc.gov/mods/ http://www.loc.gov/standards/mods/mods.xsd">
    <titleInfo>
      <title>Words and pictures /</title>
    </titleInfo>
    <name type="personal">
      <namePart xmlns:xlink="http://www.w3.org/TR/xlink">Dodd, Siobhan</namePart>
      <role>
        <text>creator</text>
      </role>
    </name>
    <typeOfResource xmlns:xlink="http://www.w3.org/TR/xlink">text</typeOfResource>
    <originInfo xmlns:xlink="http://www.w3.org/TR/xlink">
      <place>
        <code authority="marc">mau</code>
      </place>
      <place>
        <text>Cambridge, Mass</text>
      </place>
      <publisher>Candlewick Press</publisher>
      <dateIssued>1992</dateIssued>
      <edition>1st U.S. ed.</edition>
      <issuance>monographic</issuance>
    </originInfo>
    <language authority="iso639-2b">eng</language>
    <physicalDescription>
      <form authority="marcform">print</form>
      <extent>1 v. (unpaged) : col. ill. ; 26 cm.</extent>
    </physicalDescription>
    <abstract>Simple text with picture cues accompany illustrations depicting scenes of everyday life familiar to children, such as getting dressed, attending a party, playing in the park, and taking a bath.</abstract>
    <targetAudience>juvenile</targetAudience>
    <note type="statement of responsibility">Siobhan Dodds.</note>
    <subject xmlns:xlink="http://www.w3.org/TR/xlink" authority="lcshac">
      <topic>Family life</topic>
      <topic>Fiction</topic>
    </subject>
    <subject xmlns:xlink="http://www.w3.org/TR/xlink" authority="lcsh">
      <topic>Vocabulary</topic>
      <topic>Juvenile fiction</topic>
    </subject>
    <subject xmlns:xlink="http://www.w3.org/TR/xlink" authority="lcsh">
      <topic>Rebuses</topic>
    </subject>
    <subject xmlns:xlink="http://www.w3.org/TR/xlink" authority="lcsh">
      <topic>Picture puzzles</topic>
      <topic>Juvenile literature</topic>
    </subject>
    <subject xmlns:xlink="http://www.w3.org/TR/xlink" authority="lcsh">
      <topic>Picture books for children</topic>
    </subject>
    <subject xmlns:xlink="http://www.w3.org/TR/xlink" authority="lcsh">
      <topic>Picture dictionaries, English</topic>
      <topic>Juvenile literature</topic>
    </subject>
    <subject xmlns:xlink="http://www.w3.org/TR/xlink" authority="lcsh">
      <topic>Vocabulary</topic>
      <topic>Juvenile literature</topic>
    </subject>
    <classification authority="lcc">PZ7.D66275 Wo 1992</classification>
    <classification authority="lcc">PN6371.5 .D63 1992x</classification>
    <classification authority="ddc" edition="20">793.73</classification>
    <identifier type="isbn">1564020428 :</identifier>
    <identifier type="isbn">9781564020420</identifier>
    <identifier type="lccn">91071817</identifier>
    <recordInfo xmlns:xlink="http://www.w3.org/TR/xlink">
      <recordContentSource>DLC</recordContentSource>
      <recordCreationDate encoding="marc">920206</recordCreationDate>
      <recordChangeDate encoding="iso8601">20110608231047.0</recordChangeDate>
      <recordIdentifier source="GaAaGPL">33333</recordIdentifier>
    </recordInfo>
  </mods>
</modsCollection>

SuperCat can return feeds of recently edited or created authority and bibliographic records:

http://<hostname>/opac/extras/feed/freshmeat/<feed-type>/<record-type>/<import-or-edit>/<limit>/<date>

Note the following features:

Example: http://gapines.org/opac/extras/feed/freshmeat/atom/biblio/import/10/2008-01-01