I think I understand. ICU treats Z, ZZ and ZZZ as equivalent. Maybe there was a difference historically but there isn't now. Web page http://userguide.icu-project.org/formatparse/datetime shows all three, but they don't bother elsewhere. For clarity then we should probably change the xs:time pattern to be HH:mm:ssZ. Regards Steve Hanson Architect, Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh@uk.ibm.com tel:+44-1962-815848 From: Mike Beckerle To: Steve Hanson/UK/IBM@IBMGB, Date: 29/01/2013 20:02 Subject: Re: [DFDL-WG] clarification needed: datetime and time - use of ZZZ I got the idea from this page: http://icu-project.org/apiref/icu4j/com/ibm/icu/text/SimpleDateFormat.html which I found by google searching the terms "ICU ZZZZZ" The page mentions only z, zzzz, zzzzz, Z, ZZZZ, ZZZZZ. (that's one, four, and five 'z' combinations). I believe this is probably misleading however. A google search for "ICU ZZZ" turns up a different page which describes the full set of "Z" options. On Tue, Jan 29, 2013 at 12:16 PM, Steve Hanson wrote: Mike & Steve, what makes you think that ZZZ is deprecated in ICU? I'm not seeing a need to change. Regards Steve Hanson Architect, Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh@uk.ibm.com tel:+44-1962-815848 From: Steve Lawrence To: Steve Hanson/UK/IBM@IBMGB, Cc: Mike Beckerle , Date: 29/01/2013 14:11 Subject: Re: [DFDL-WG] clarification needed: datetime and time I'll add that ZZZZZ in ICU4J accepts all types of timezone formats (RFC 822, GMT Offset, and ISO 8601). So it will also accept formats with both Z and ZZZZ timezone patterns. It outputs as ISO 8601, though. - Steve On 01/29/2013 09:04 AM, Steve Hanson wrote:

Hi Mike,

The phrase " derived from the XML schema date/time type" just means that the pattern varies depends on whether the xsd type is date, dateTime or time, it does not mean that it is set up for parsing a date, dateTime or time value that conforms to the lexical space for the xsd type. The pattern values were chosen to be the typical patterns seen in the non-XML world.

We can debate whether ZZZ is obsolescent and needs to be updated. IBM DFDL has shipped with ZZZ as far as I am aware.

Regards

Steve Hanson Architect, Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh@uk.ibm.com tel:+44-1962-815848

From: Mike Beckerle To: dfdl-wg@ogf.org, Date: 29/01/2013 13:55 Subject: [DFDL-WG] clarification needed: datetime and time Sent by: dfdl-wg-bounces@ogf.org

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

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Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU -- Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU