Reads: "The style:writing-mode-automatic attribute specifies whether a consumer may recalculate the writing mode of a paragraph based on its content whenever the content is edited. The actual value for the writing-mode should be contained in a style:writing-mode attribute, so that consumers that do not support an automatic writing mode calculation or use a different algorithm always know the actual value.

By specifying a fo:text-align with value start additionally, the text alignment can be adapted to the writing mode simultaneously."

Suggest:

"The style:writing-mode-automatic attribute specifies whether a consumer may recalculate the writing mode of a paragraph whenever its content is edited.

The writing-mode should be specified in a style:writing-mode attribute.

It the fo:text-align attribute has the value start, text alignment can be adapted along with the writing mode."

I am not sure why we needed "...so that consumers that do not support an automatic writing mode calculation or use a different algorithm always know the actual value." Suggest deleting it.

Actually, I would lose the middle sentence unless someone has an argument for saying an attribute should have the value we claim it records.

BTW, re-cast the attribute values to read:

false: consumers should not recalculate writing mode of a paragraph whenever its content is edited.
true: consumers should recalculate writing mode of a paragraph whenever its content is edited.

The "based on its content" is unnecessary since there is no other basis for recalculation of writing-mode.