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Subject: [OASIS Issue Tracker] Commented: (OFFICE-2245) Conventional weeknot defined

    [ http://tools.oasis-open.org/issues/browse/OFFICE-2245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16774#action_16774 ] 

Andreas Guelzow  commented on OFFICE-2245:

We should be referring to either ISO 8601:1988 or ISO8601:2004. Neither of them allows for a modification that has the week start on a Sunday, so we should not have that option!

> Conventional week not defined
> -----------------------------
>                 Key: OFFICE-2245
>                 URL: http://tools.oasis-open.org/issues/browse/OFFICE-2245
>             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
>          Issue Type: Bug
>          Components: OpenFormula
>    Affects Versions: ODF 1.2
>            Reporter: Patrick Durusau
>            Priority: Minor
> WEEKNUM reads:
> "Determine the conventional non-ISO week number of the year for the given date."
> The term "conventional non-ISO week" occurs once and only once, here.
> WEEKNUM (semantics):
> "Returns the number of the week in the year for the given date. Note that this is not the ISO week number. If Type is 1, Sunday is the first day of the week; if 2, Monday is the first day of the week."
> See ISOWEEKNUM, which reads (under semantics):
> "Returns the number of the ISO 8601 week in the year for the given date. Note that this is not the "conventional" week number used by some applications (for that, see WEEKNUM). In this system, week number 1 of any year is the week that contains January 4, because (1) Monday is considered the first day of the week, and (2) a week that lies partly in one year and partly in another is assigned a number in the year in which most of its days lie."
> First, what is the reference "In this system..." ISO I assume? 
> Second, "conventional" week is defined only by not being the ISO 8601 week. That seems weak to me. 
> Under both definitions, there are options to start weeks on Monday or Sunday. Was that intentional? I say that because of the table under ISOWEEKNUM and the prose under WEEKNUM. How does that interact with considering Monday to be the first day of the week?
> I am looking at ways to calculate the ISO week number, not sure if that will be helpful or not. 

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