[ 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:
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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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