To specify HTML <table> attributes for a single table or a group of tables:
[TableAttributes] ; Table ID = text (macro) to put inside table element, overrides ; settings in [Tables] for Border, Spacing, and Padding, and ; [Attributes] for table SomeTable = attribute="value"
On the left of the = sign you can specify a TableID or a table group name, and you can use wildcards in the name. See §33.2.1 Creating table groups.
On the right of the = sign you can include any arbitrary HTML, even macros (see §37. Working with macros) and JavaScript (perhaps something like onmouseover="javascript:dosomething(now)"). Just keep it all on the same line.
For example, for cell borders, rather than use a global setting for all tables (as you would in the [Tables] section or in the [Attributes] section), you can set the borders based on the table format name:
[TableAttributes] FormatA= border="0" cellspacing="2" cellpadding="1"
Values you specify in the [TableAttributes] section override corresponding settings in the [Tables] section, and also override any attributes you assign to the table element in the [Attributes] section. However, see §33.4.8.2 Taming border, cellspacing, and cellpadding settings for special constraints on specifying values for border, cellspacing, and cellpadding.