fn:timezone-from-dateTime($arg as xs:dateTime?) as

xs:dayTimeDuration?

However, we don't have this result type dayTimeDuration, so rather than add that type, which is a structured thing like: PnDTnHnMnS, we should say it matches the iso 8601 time zone suffix on an iso datetime.
So "Z" or "-05:00" etc.

Since it is not exactly the existing Xpath function, perhaps this function should not have this name or not be in the fn namespace. Come to think of it. I don't think we ever say exactly what the fn: prefix is bound to in DFDL.

On Tue, Jan 29, 2013 at 8:55 AM, Mike Beckerle <mbeckerle.dfdl@gmail.com> wrote:

In the below. Should xs:datetime have trailing timezone as well? Right now it has no tz component.

Seems to me it should to match iso 8601 format which is what XSD uses.

Also, I believe we now think ZZZ is not the right behavior, and seems to be deprecated in ICU. The right thing is ZZZZZ.

calendarPatternKind

Enum

Valid values ‘explicit’, ‘implicit’

‘explicit’ means the pattern is given by dfdl:calendarPattern,

‘implicit’ means the pattern is derived from the XML schema date/time type.

Logical Type

Default Pattern

xs:date

yyyy-MM-dd

xs:dateTime

yyyy-MM-dd'T'HH:mm:ss

xs:time

HH:mm:ssZZZ

Annotation: dfdl:element, dfdl:simpleType

--
Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com