###### 3.1.3.1.25 source

The <source> element identifies a resource from which the present topic is derived, either completely or in part.

The <source> element contains a description of the resource. Alternatively, the href attribute is used to reference a description of the resource. It is implementation-dependent what it means when the element has both content and an href attribute value.

This element is equivalent to the Source element in Dublin Core.

###### Contains

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

###### Contained by

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

###### Inheritance

- topic/source

###### Example

    <prolog>
     <source>Somewhere, someplace</source>
    </prolog>

###### Attributes

Name | Description | Data Type | Default Value | Required?
href | Provides a reference to a resource from which the present resource is derived. See 3.4.2.1 The href attribute for detailed information on supported values and processing implications. | CDATA | #IMPLIED | No
type | Describes the target of a reference. See 3.4.2.8 The type attribute for detailed information on supported values and processing implications. | CDATA | #IMPLIED | No
format | The format attribute identifies the format of the resource being referenced. See 3.4.2.9 The format attribute for details on supported values. | CDATA | #IMPLIED | No
scope | The scope attribute identifies the closeness of the relationship between the current document and the target resource. See 3.4.2.10 The scope attribute for more information on values. | (local | peer | external | -dita-use-​conref-​target) | #IMPLIED | No
keyref | Keyref provides a redirectable reference based on a key defined within a map. See 3.4.2.3 The keyref attribute for information on using this attribute. | CDATA | #IMPLIED | No
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: 3.1.3.1.24 series

Next Topic: 3.1.3.1.26 vrmlist

Parent Topic: 3.1.3.1 Prolog (metadata) elements

Sibling Topics:

3.1.3.1.1 prolog

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

3.1.3.1.26 vrmlist

3.1.3.1.27 vrm