[Libreoffice-bugs] [Bug 137764] New: New Writer formula functions should use dedicated namespace in ODF

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=137764

            Bug ID: 137764
           Summary: New Writer formula functions should use dedicated
                    namespace in ODF
           Product: LibreOffice
           Version: 7.1.0.0.alpha0+ Master
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: mikekaganski at hotmail.com
                CC: michael.stahl at cib.de, nemeth at numbertext.org,
                    rb.henschel at t-online.de

In  tdf#123388, tdf#123354, tdf#123390, tdf#123356, new functions were added to
formulas in Writer: PRODUCT, ABS, SIGN, COUNT.

They all are written into ODF using usual syntax, e.g. in text:formula
attribute of text:expression element, or in table:formula attribute of
table:table-cell element.

These attributes are defined as "The attribute value should begin with a
namespace prefix followed by ":" (U+003A, COLON), followed by the text of the
formula. The namespace bound to the prefix determines the syntax and semantics
of the formula".

The namespace used in current master for these formulas is
xmlns:ooow="http://openoffice.org/2004/writer". It looks like we expect any
application that supports the old OpenOffice formulas to support these new
added functions.

Should we introduce a special namespace for the formulas with new functions?
Maybe have the functions standardized in a next version of ODF standard (as a
common standardized set of functions and formula syntax)? Otherwise, we risk
having multiple incompatible extensions/implementations of the formulas for
Writer.

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