25.2.1.2 Using header cells to define column groups

Mif2Go refers to a column-header cell with a group attribute as a ColGroup cell. To make a header cell a ColGroup cell, include in it one of the following:

• a paragraph that is in a format you have designated [HtmlStyles] ColGroup
(see §25.2.2 Using paragraph formats for table-cell attributes)

• a CellGroup marker that you have given content col
(see §25.2.4 Using custom markers for table-cell attributes).

When you designate a header cell as a ColGroup cell, the effect of that property depends on which method you specify for table columns:

• scope automatically specifies the following:

- [Tables]ColGroupElements=Yes
(ColGroup cell starts a new <colgroup> element)

- scope="colgroup" in the ColGroup cell
(ColGroup cell affects all other cells subsumed by its <colgroup>)

• id/headers automatically specifies the following:

- [Tables]ColGroupIDs=Yes
(ColGroup cell gets id="groupN", dependent cells get headers="groupN")

See §26.5.1 Understanding how the ColGroup property works for more information.

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