Add the value page-content-top to the list in section style:vertical-rel (20.398 in ODF 1.3, actually 20.402) as: page-content-top : vertical position of frame positioned relative to the area above the page content area or can case you think, that it is not clear enough: page-content-top : vertical position of frame positioned relative to the area above the top edge of page content area   And allow it for anchor types 'page', 'paragraph' and 'char', that is, add the following row to table 'Vertical Relation Values' page-content-top | X |   | X | X |   |   The following schema-diff is against the schema in GitHub from 2022-06-06 --- "OpenDocument-v1.3-schema 2022-06-06 from Git.rng" 2022-06-06 14:11:21.010934200 +0200 +++ "OpenDocument-v1.3-schema 2022-06-06 from Git plusmynew.rng" 2022-06-06 14:14:41.774191400 +0200 @@ -2842,10 +2842,11 @@ <rng:choice> <rng:value> page </rng:value> <rng:value> page-content </rng:value> <!-- https://issues.oasis-open.org/browse/OFFICE-4073 --> <rng:value> page-content-bottom </rng:value> + <rng:value> page-content-top </rng:value> <rng:value> frame </rng:value> <rng:value> frame-content </rng:value> <rng:value> paragraph </rng:value> <rng:value> paragraph-content </rng:value> <rng:value> char </rng:value>

In Part 3, 20.398: -  add page-content-top to the list of defined values of attribute style:vertical-rel : page-content-top : vertical position of frame positioned relative to the top edge of page content area. -  add page-content-top to Table 24 with 'X' in columns representing values ' page ' , ' paragraph ' and ' char ' (of attribute text:anchor-type ): Schema change as proposed.