If you give a FrameMaker custom marker type a name that starts with Table, Row,
or Cell, Mif2Go uses the content of the marker for the value
of whatever HTML attribute is designated by the rest of the marker-type name, and puts the attribute and its value
in the generated <table>, <th>,
<tr>, or <td>
tag. An attribute value assigned with a custom marker takes precedence over values of the same attribute
assigned any other way; see Table 24
For example, to guarantee that a certain table cell is top-aligned in HTML regardless of its properties in FrameMaker or any properties assigned in the configuration file, you could insert a marker of type CellValign in the cell in FrameMaker, and make the content of that marker top. In HTML, the resulting tag for that cell would be <td valign="top">.
§25.1.3 Creating custom markers for WAI attributes
§29.2.4 Using attribute markers for HTML or XML