The <colspec> element contains a column specification for a table, including assigning a column name and number, cell content alignment, and column width.
|topic, map, concept, ditabase, glossary, glossentry, glossgroup, reference, task, bookmap, classifyMap, subjectScheme, machineryTask, learningAssessment, learningBookmap, learningContent, learningMap, learningOverview, learningPlan, learningSummary||no content|
|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||tgroup|
|Name||Description||Data Type||Default Value||Required?|
|colnum||Indicates the number of a column in the table, counting from the first logical column to the last column.||NMTOKEN||#IMPLIED||No|
|colname||Specifies the table column name in which an entry is found.||NMTOKEN||#IMPLIED||No|
|colwidth||Describes the column width.||CDATA||#IMPLIED||No|
|colsep||Column separator. A value of 0 indicates no separators; 1 indicates separators.||NMTOKEN||#IMPLIED||No|
|rowsep||Row separator. A value of 0 indicates no separators; 1 indicates separators.||NMTOKEN||#IMPLIED||No|
|align||Describes the alignment of text in a table column. Allowable
||(left | right | center | justify | char | -dita-use-conref-target)||#IMPLIED||No|
|char||Specifies the character for aligning the table entry data.
Default source for entry elements starting in this column. If character alignment is specified, the value is the single alignment character source for any implied char values for entry immediately in this column. A value of "" (the null string) means there is no aligning character.
For example, if align="char" and char="r", then text in the entry should align with the first occurrence of the letter "r" within the entry.
|charoff||Specifies the horizontal offset of alignment character when
Default source for entry elements starting in this column. For character alignment on an entry in the column, horizontal character offset is the percent of the current column width to the left of the (left edge of the) alignment character.
This value should be number, greater than 0 and less than or equal to 100.
For example, if align="char", char="r", and charoff="50", then text in the entry should align 50% of the distance to the left of the first occurrence of the character "r" within the entry.
|base||A generic attribute that has no specific purpose. It is intended to act as a base for specialized attributes that have a simple value syntax like the conditional processing attributes (one or more alphanumeric values separated by whitespace), but is not itself a filtering or flagging attribute. The attribute takes a space-delimited set of values. However, when acting as a container for generalized attributes, the content model will be more complex; see Attribute generalization for more details.||CDATA||#IMPLIED||No|
|id-atts attribute group (id, conref, conrefend, conaction, conkeyref)||A set of related attributes, described in id-atts attribute group|
|localization-atts attribute group (translate, xml:lang, dir)||A set of related attributes, described in localization-atts attribute group.|
|global-atts attribute group (xtrf, xtrc)||A set of related attributes, described in global-atts attribute group|
|class||A common attribute described in Other common DITA attributes|