###### 3.1.2.1.9 relheader

The <relheader> element is a row in a relationship table that contains column definitions (<relcolspec> elements). Each table can have only one set of column definitions.

###### Contains

Doctype | Content model
map, bookmap, classifyMap, subjectScheme, learningBookmap, learningMap | (relcolspec) (one or more)

###### Contained by

Doctype | Content model
map (base), map (technical content), bookmap, classifyMap, subjectScheme, learningBookmap, learningMap | reltable

###### Inheritance

- map/relheader

###### Example

See 3.1.2.1.6 reltable.

###### 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: 3.1.2.1.8 relcell

Next Topic: 3.1.2.1.10 relcolspec

Parent Topic: 3.1.2.1 Basic map elements

Sibling Topics:

3.1.2.1.1 map

3.1.2.1.2 topicref

3.1.2.1.3 topicmeta

3.1.2.1.4 anchor

3.1.2.1.5 navref

3.1.2.1.6 reltable

3.1.2.1.7 relrow

3.1.2.1.8 relcell

3.1.2.1.10 relcolspec