In ODF 1.1 Section 8.2.4 there is the following paragraph about <table:table-rows> just before the schema fragment:

"The <table:table-header-rows> and <table:table-rows> element are very similar to [HTML4]'s <THEAD> and <TBODY> elements."

There is in fact no such similarity. header rows do not work in the same manner as in [HTML4]. In particular, there is no significance to the inclusion of <table:table-row> elements in a <table:table-rows> element. <table:table-row> elements can be introduced without inclusion in either <table:table-header-rows> or <table:table-rows>.

The use of row groups also breaks the similarity with [HTML4]. In [HTML4] <THEAD>, <TBODY> (and <TFOOT>) are also for providing distinctive styling over the groupings. The ODF 1.1 <table:table-rows> element has no attributes.

The statement in 8.1.2 that <table:table-row> is similar to [XSL] <fo:table-row> makes the relationship to [HTML4] even less plausible (and vice versa).