<daogrp> Digital Archival Object Group

<daogrp> is a wrapper element which contains two or more related <daoloc> elements that should be thought of as a group and may share a single <daodesc>. These may form an extended link group, enabling a set of multi-directional links. Related and useful elements are: <dao>, <daodesc>, <daoloc>, and <linkgrp>.

<daogrp> is one of the elements which may be used within <archdesc>, <archdescgrp>, <c>, <c01> through <c12>, <descgrp>, <did>, <odd>, and <scopecontent>.


  • ALTRENDER – not required. Use if the content of the element should be displayed or printed differently than the rendering established in a style sheet for other occurrences of the element.
  • AUDIENCE – not required. Use to set whether the element’s contents will be visible to external users or to internal ones. Possible values are: “internal” and “external.”
  • ID – not required. Creates an ID for element. Can be used for linking.
  • LINKTYPE – FIXED. Must contain the value “extended.”
  • ROLE – not required. Information that explains to application software the part that a remote resource plays in a link.
  • TITLE – not required. Information that serves as a viewable caption which explains to users the part that a resource plays in a link.


<daogrp> may contain: <arc>, <daodesc>, <daoloc>, <extptrloc>, <extrefloc>, <ptrloc>, <refloc>, and <resource>.


As with <dao>, an excellent example of <daogrp> in use comes from the LoC website:

<c level="file">
        <unittitle>Photographs of John Smith and family members</unittitle>
        <unitdate type="inclusive" normal="1895/1928">1895-1928</unitdate>
        <daogrp linktype="extended">
                <p>Sample digitized image from this file: John Smith graduation portrait,
                <date normal="18950528">28 May 1895</date>.</p>
            <resource linktype="resource" label="start"/>
            <daoloc entityref="f0042_1tmb" linktype="locator" label="thumb"/>
            <daoloc entityref="f0042_1ref" linktype="locator" label="reference"/>
            <arc linktype="arc" show="embed" actuate="onload" from="start" to="thumb"/>
            <arc linktype="arc" show="new" actuate="onrequest" from="thumb" to="reference"/>

EAD tag library entry for <daogrp>.