###### 3.1.3.1.1 prolog

The <prolog> element contains information about the topic as an whole (for example, author information or subject category) that is either entered by the author or maintained by a software application. Much of the metadata inside the <prolog> will not be displayed with the topic when the topic is rendered, but may be used by processes that generate search indexes or customize navigation.

###### Contains

Doctype | Content model
topic, concept, ditabase, glossary, glossentry, glossgroup, reference, task, machineryTask | ( (author) (any number) then (source) (optional) then (publisher) (optional) then (copyright) (any number) then (critdates) (optional) then (permissions) (optional) then (metadata) (any number) then (resourceid) (any number) then (data or data-about or foreign or unknown) (any number) )
learningAssessment, learningContent, learningOverview, learningPlan, learningSummary | ( (author) (any number) then (source) (optional) then (publisher) (optional) then (copyright) (any number) then (critdates) (optional) then (permissions) (optional) then (metadata or lcLom) (any number) then (resourceid) (any number) then (data or data-about or foreign or unknown) (any number) )

###### Contained by

Doctype | Content model
topic (base), topic (technical content) | topic
concept | topic, concept
ditabase | topic, concept, task, reference, glossentry, glossgroup
glossary, glossentry | topic, concept, glossentry
glossgroup | topic, concept, glossentry, glossgroup
reference | topic, reference
task (strict), task (general), machineryTask | topic, task
learningAssessment | topic, learningBase, learningAssessment
learningContent | topic, learningBase, task, concept, reference, learningSummary, learningAssessment, learningContent
learningOverview | topic, learningBase, learningOverview
learningPlan | topic, learningBase, learningPlan
learningSummary | topic, learningBase, learningSummary

###### Inheritance

- topic/prolog

    <prolog>
      <metadata>
        <audience type="user" job="using" experiencelevel="novice"/>
      </metadata>
    </prolog>

###### 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 | A common attribute described in 3.4.1.9 Other common DITA attributes |  |  |

Previous Topic: 3.1.3.1 Prolog (metadata) elements

Next Topic: 3.1.3.1.2 audience

Parent Topic: 3.1.3.1 Prolog (metadata) elements

Sibling Topics:

3.1.3.1.2 audience

3.1.3.1.3 author

3.1.3.1.4 brand

3.1.3.1.5 category

3.1.3.1.6 component

3.1.3.1.7 copyright

3.1.3.1.8 copyrholder

3.1.3.1.9 copyryear

3.1.3.1.10 created

3.1.3.1.11 critdates

3.1.3.1.12 featnum

3.1.3.1.13 keywords

3.1.3.1.14 metadata

3.1.3.1.15 othermeta

3.1.3.1.16 permissions

3.1.3.1.17 platform

3.1.3.1.18 prodinfo

3.1.3.1.19 prodname

3.1.3.1.20 prognum

3.1.3.1.21 publisher

3.1.3.1.22 resourceid

3.1.3.1.23 revised

3.1.3.1.24 series

3.1.3.1.25 source

3.1.3.1.26 vrmlist

3.1.3.1.27 vrm