###### 3.1.5.1.19 subjectRole

The <subjectRole> element, when used within a <subjectRel> element, contains a set of subjects that are related to other subjects in the same row of the current <subjectRelTable>. By default, no relationship is defined between multiple subjects in the same <subjectRole> element. When used within the <subjectRelHeader>, the <subjectRole> element defines the category of subject or relationship provided by that column.

###### Contains

Doctype | Content model
subjectScheme | ( (data or data-about or subjectdef or topicref or (anchorref or keydef or mapref or topicgroup or topichead or topicset or topicsetref) ) (any number) )

###### Contained by

Doctype | Content model
subjectScheme | subjectRelHeader, subjectRel

###### Inheritance

- map/relcell subjectScheme/subjectRole

###### Example

The subject relationship table in this example establishes environmentFor relationships between operating systems and applications. Based on the subjectRole element, subjects in the first column are operating systems which are the environment for an application, while subjects in the second column are applications that run in that environment. For a user interested in content about the operating system, content about the applications may also be relevant.

    <subjectScheme>
      <hasKind>
        <subjectdef keys="operatingSystem">
            <subjectdef keys="linuxOS"/>
            <subjectdef keys="windowsOS"/>
        </subjectdef>
        <subjectdef keys="application">
            <subjectdef keys="IDE">
                <subjectdef keys="eclipseIDE"/>
                <subjectdef keys="visualStudioIDE"/>
            </subjectdef>
            <subjectdef keys="webBrowser">
                <subjectdef keys="firefoxBrowser"/>
                <subjectdef keys="ieBrowser"/>
            </subjectdef>
        </subjectdef>
      </hasKind>
      ...
      <subjectRelTable>
        <subjectRelHeader>
          <subjectRole>
            <subjectdef keyref="operatingSystem">
              <hasRelated keyref="environmentFor">
                <subjectdef keyref="application"/>
              </hasRelated>
            </subjectdef>
          </subjectRole>
          <subjectRole>
            <subjectdef keyref="application"/>
          </subjectRole>
        </subjectRelHeader>
        <subjectRel>
          <subjectRole>
            <subjectdef keyref="linuxOS"/>
            <subjectdef keyref="windowsOS"/>
          </subjectRole>
          <subjectRole>
            <subjectdef keyref="eclipseIDE"/>
            <subjectdef keyref="firefoxBrowser"/>
          </subjectRole>
        </subjectRel>
        <subjectRel>
          <subjectRole>
            <subjectdef keyref="windowsOS"/>
          </subjectRole>
          <subjectRole>
            <subjectdef keyref="ieBrowser"/>
            <subjectdef keyref="visualStudioIDE"/>
          </subjectRole>
        </subjectRel>
      </subjectRelTable>
    </subjectScheme>

A table view of the subjectRelTable may look like this; each <subjectRel> represents a single row, and each <subjectRole> represents a cell.

subjectRelTable as a table

    <subjectdef keyref="operatingSystem">
     <hasRelated keyref="environmentFor">
      <subjectdef keyref="application"/>
     </hasRelated>
    </subjectdef>
    <subjectdef keyref="application"/>
<subjectdef keyref="linuxOS"/> <subjectdef keyref="windowsOS"/> | <subjectdef keyref="eclipseIDE"/> <subjectdef keyref="firefoxBrowser"/>
<subjectdef keyref="windowsOS"/> | <subjectdef keyref="ieBrowser"/> <subjectdef keyref="visualStudioIDE"/>

###### Attributes

Name | Description | Data Type | Default Value | Required?
topicref-atts attribute group (collection-type, processing-role, type, scope, locktitle, format, linking, toc, print, search, chunk) | A set of related attributes. See 3.4.1.8 topicref-atts, topicref-atts-no-toc, and topicref-atts-without-format attribute groups. |  |  |
univ-atts attribute group (includes select-atts, id-atts, and localization-atts groups) | A set of related attributes, described in 3.4.1.3 univ-atts attribute group |  |  |
global-atts attribute group (xtrf, xtrc) | A set of related attributes, described in 3.4.1.2 global-atts attribute group |  |  |
class | A common attribute described in 3.4.1.9 Other common DITA attributes |  |  |

Previous Topic: 3.1.5.1.18 subjectRel

Next Topic: 3.1.5.2 Classification domain elements

Parent Topic: 3.1.5.1 Subject scheme maps

Sibling Topics:

3.1.5.1.1 subjectScheme

3.1.5.1.2 schemeref

3.1.5.1.3 hasInstance

3.1.5.1.4 hasKind

3.1.5.1.5 hasNarrower

3.1.5.1.6 hasPart

3.1.5.1.7 hasRelated

3.1.5.1.8 enumerationdef

3.1.5.1.9 elementdef

3.1.5.1.10 attributedef

3.1.5.1.11 defaultSubject

3.1.5.1.12 subjectHead

3.1.5.1.13 subjectHeadMeta

3.1.5.1.14 subjectdef

3.1.5.1.15 relatedSubjects

3.1.5.1.16 subjectRelTable

3.1.5.1.17 subjectRelHeader

3.1.5.1.18 subjectRel