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Subject: [OASIS Issue Tracker] Commented: (OFFICE-2059) Resolve potentialambiguity with optionality in leading "=" and "=="

    [ http://tools.oasis-open.org/issues/browse/OFFICE-2059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16098#action_16098 ] 

Dennis Hamilton commented on OFFICE-2059:

If OpenFormula defines its basic expression to always have a leading "=" then the optional second "=" is unambiguous.

There is then also no ambiguity between the prefix and any other occurrence of ":" in the basic expression itself.  

That resolves any potential for ambiguity.

I think the language in ODF 1.2 part 1 where formulas might appear should allow this case so that hosting of OpenFormula is direct.

I think the language in OpenFormula about prohibiting a prefix when OpenFormula is intended should be omitted.  It is up to the hosting document format what its default formula language is, if any.  I suspect that ODF  1.2 should be worded to say that the prefix MAY be omitted when OpenFormula 1.x is to be understood, but we must be careful about future up-down-level issues and OpenFormula versioning.

[I'll look at splitting these out, but I wanted to capture my last thoughts from the discussion on the call today.]

> Resolve potential ambiguity with optionality in leading "=" and "=="
> --------------------------------------------------------------------
>                 Key: OFFICE-2059
>                 URL: http://tools.oasis-open.org/issues/browse/OFFICE-2059
>             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
>          Issue Type: Task
>          Components: OpenFormula, Table
>    Affects Versions: ODF 1.2
>         Environment: This comment applies to the current working draft of open formula
>            Reporter: Dennis Hamilton
>            Priority: Minor
> Between statements in ODF 1.2 Part 1 where OpenFormula formulae may be hosted, and the description of the use of optional namespace prefix, leading "=", and the extra leading "==" for recalculation control, I am concerned that this situation has unresolvable ambiguities.

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