Update of extended ODF schema

[Laurent Balland]

Hi Regina,

Actually, ODF1.3 specifies only strictly positive number: "The index of 
a position starts with 1" [1] and Eike asked for a loext:position 
attribute if negative or null position. [2]

So I need a loext:position attribute, to support for negative index. But 
if there is only only negative positions, then number:embedded-text has 
no number:position and complains. That's why I created a new node 
loext:embedded-text-decimal. But I don't know how to correctly write 
OpenDocument-v1.3+libreoffice-schema.rng

Best regards,

Laurent Balland


[1] 
https://docs.oasis-open.org/office/OpenDocument/v1.3/os/part3-schema/OpenDocument-v1.3-os-part3-schema.html#__RefHeading__1417578_253892949

[2] 
https://gerrit.libreoffice.org/c/core/+/135918/4..8/xmloff/source/style/xmlnumfe.cxx#b605