In the XSL WD I can read:

fo:display-sequence
.....
Determination of trait values:

The fo:display-sequence has no properties that are directly used by it.
However, it does serve as a carrier to hold inheritable properties that are
utilized by its children.

.....

Properties:

 Section 5.18.9: id


I think there's something wrong. ID can't be the only property.
The same for the fo:inline-sequence object.

Bye.



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