###### 3.1.1.2.11 dthd

The definition term heading (<dthd>) element is contained in a definition list head (<dlhead>) and provides an optional heading for the column of terms in a description list.

###### Contains

Doctype | Content model
topic (base), map (base), classifyMap, subjectScheme, learningAssessment, learningBookmap, learningContent, learningMap, learningOverview, learningPlan, learningSummary | ( text data or boolean or keyword or ph or b or i or sup or sub or tt or u or q or term or tm or state or data or data-about or foreign or unknown or image) (any number)
topic (technical content), map (technical content), concept, ditabase, glossary, glossentry, glossgroup, reference, task, bookmap | ( text data or boolean or keyword or apiname or option or parmname or cmdname or msgnum or varname or wintitle or ph or b or i or sup or sub or tt or u or codeph or synph or filepath or msgph or systemoutput or userinput or menucascade or uicontrol or q or term or abbreviated-form or tm or state or data or data-about or foreign or unknown or image) (any number)
machineryTask | ( text data or boolean or keyword or wintitle or ph or b or i or sup or sub or tt or u or menucascade or uicontrol or q or term or tm or state or data or data-about or foreign or unknown or image) (any number)

###### Contained by

Doctype | Content model
topic (base), map (base), topic (technical content), map (technical content), concept, ditabase, glossary, glossentry, glossgroup, reference, task (strict), task (general), bookmap, classifyMap, subjectScheme, machineryTask, learningAssessment, learningBookmap, learningContent, learningMap, learningOverview, learningPlan, learningSummary | dlhead

###### Inheritance

- topic/dthd

###### Example

Definition list with a heading

    <dl>
     <dlhead>
      <dthd>Image File View Selection</dthd>
      <ddhd>Resulting Information</ddhd>
     </dlhead>
     <dlentry>
      <dt>File Type</dt>
      <dd>Image's file extension</dd>
     </dlentry>
     <dlentry>
      <dt>Image Class</dt>
      <dd>Image is raster, vector, metafile or 3D</dd>
     </dlentry>
     <dlentry>
      <dt>Number of pages</dt>
      <dd>Number of pages in the image</dd>
     </dlentry>
     <dlentry>
      <dt>Fonts</dt>
      <dd>Names of the fonts contained within a vector image</dd>
     </dlentry>
    </dl>

###### Attributes

Name | Description | Data Type | Default Value | Required?
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, outputclass | Common attributes described in 3.4.1.9 Other common DITA attributes |  |  |

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Next Topic: 3.1.1.2.12 example

Parent Topic: 3.1.1.2 Body elements

Sibling Topics:

3.1.1.2.1 alt

3.1.1.2.2 cite

3.1.1.2.3 dd

3.1.1.2.4 desc

3.1.1.2.5 ddhd

3.1.1.2.6 dl

3.1.1.2.7 dlentry

3.1.1.2.8 dlhead

3.1.1.2.9 dt

3.1.1.2.10 draft-comment

3.1.1.2.12 example

3.1.1.2.13 fig

3.1.1.2.14 figgroup

3.1.1.2.15 fn

3.1.1.2.16 image

3.1.1.2.17 keyword

3.1.1.2.18 li

3.1.1.2.19 lines

3.1.1.2.20 longdescref

3.1.1.2.21 longquoteref

3.1.1.2.22 lq

3.1.1.2.23 object

3.1.1.2.24 note

3.1.1.2.25 ol

3.1.1.2.26 p

3.1.1.2.27 param

3.1.1.2.28 ph

3.1.1.2.29 pre

3.1.1.2.30 q

3.1.1.2.31 section

3.1.1.2.32 sectiondiv

3.1.1.2.33 sl

3.1.1.2.34 sli

3.1.1.2.35 term

3.1.1.2.36 text

3.1.1.2.37 tm

3.1.1.2.38 ul

3.1.1.2.39 xref