February 2003 - tdwg-content

Re: XML: How to require either or both of two child elements, but prevent both missing?
by unknown＠example.com 22 Feb '03

22 Feb '03

Hello: Wouldn´t this allow for the case when there are two A's or two B's? I haven't tried it yet but, I just glanced at the spec and found an example that would yield something like this if applied: <?xml version="1.0" encoding="UTF-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified"> <xs:element name="Parent"> <xs:complexType> <xs:choice> <xs:group ref="elementABopt"/> <xs:element ref="elementB" minOccurs="1"/> </xs:complexType> </xs:element> <xs:element name="elementAoptB"> <xs:complexType> <xs:sequence> <xs:element ref="elementA" minOccurs="1"/> <xs:element ref="elementB" minOccurs="0"/> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="elementA"> </xs:element> <xs:element name="elementB"> </xs:element> </xs:schema> Do you see any problem here (besides complexity?) Hope this helps... Greetings, William. -----Original Message----- From: Jim Croft [mailto:jrc@ANBG.GOV.AU] Sent: Sábado 22 de Febrero de 2003 04:43 PM To: TDWG-SDD(a)USOBI.ORG Subject: Re: XML: How to require either or both of two child elements, but prevent both missing? >How in XML-schema do you make sure that of two possible child >elements, either or both, but not neither are present? How about changing the model to 'choice' and requiring one but allowing two (or multiple) occurrences of optional elements? something like this maybe? <?xml version="1.0" encoding="UTF-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified"> <xs:element name="Parent"> <xs:complexType> <xs:choice minOccurs="1" maxOccurs="2"> <xs:element name="A" minOccurs="0" maxOccurs="1"/> <xs:element name="B" minOccurs="0" maxOccurs="1"/> </xs:choice> </xs:complexType> </xs:element> </xs:schema> ~ Jim Croft ~ jrc(a)anbg.gov.au ~ 02-62465500 ~ www.anbg.gov.au/jrc/ ~

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Meeting in Paris
by Gregor Hagedorn 11 Feb '03

11 Feb '03

Hello everybody, Rather _really_ late, but the minutes and the start page are now as good as I can get them for the moment. Please read the minutes from Brazil. For those coming to the meeting it would be perhaps helpful for us if you can print them out, so we can refer to them. Some people have notified me that there were broken links yesterday; I hope I have fixed all hyperlinks now. I can be reached by email up to Wednesday, 11:00 GMT. If you sent comments after that time, please mail to TDWG-SDD(a)USOBI.ORG; we will keep checking that list during the meeting. Best wishes, I see forward to the meeting Gregor ---------------------------------------------------------- Gregor Hagedorn (G.Hagedorn(a)bba.de) Institute for Plant Virology, Microbiology, and Biosafety Federal Research Center for Agriculture and Forestry (BBA) Koenigin-Luise-Str. 19 Tel: +49-30-8304-2220 14195 Berlin, Germany Fax: +49-30-8304-2203 Often wrong but never in doubt!

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Meeting in Paris
by Gregor Hagedorn 07 Feb '03

07 Feb '03

Dear colleagues I am running late with working through the SDD development from Brazil. I spent most available time this week, but that was not enough. However, a valid xml schema and example document is now available (sorry Bob, the one I emailed you wasn't!) and I have the minutes 90% done and have uploaded all to the SDD site (http://160.45.63.11/Projects/TDWG-SDD/index.html). The first pages and all links are checked and readable. However, at some point I have put in a marker, so that if you don't have to, refrain from reading on. There should be a better version after the weekend for you. Thanks, I look forward to the meeting in Paris. I am drawing up an agenda of what I consider priorities, but please contact me with the things you think should be done first. Gregor ---------------------------------------------------------- Gregor Hagedorn (G.Hagedorn(a)bba.de) Institute for Plant Virology, Microbiology, and Biosafety Federal Research Center for Agriculture and Forestry (BBA) Koenigin-Luise-Str. 19 Tel: +49-30-8304-2220 14195 Berlin, Germany Fax: +49-30-8304-2203 Often wrong but never in doubt!

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