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Re: XML: How to require either or both of two child elements, but prevent both missing?
by unknown＠example.com 23 Feb '03

23 Feb '03

Hello Donald: I'm sorry, I have to say I really don´t know because I haven´t tried it out. I just thought it wouldn't allow for 2 B's if you had to choose first between an A[B] element and a B element. But anyway I couldn't agree more with you: it surely gets too messy, specially if it's one of the first elements in the hierarchy, as this seems the case. See you next week, William. -----Original Message----- From: Hobern, Donald [mailto:DHobern@GBIF.ORG] Sent: Domingo 23 de Febrero de 2003 02:26 AM To: TDWG-SDD(a)USOBI.ORG Subject: Re: XML: How to require either or both of two child elements, but prevent both missing? Wouldn't this example too would allow for 2 B's? It may be messy (especially if you progress beyond two elements), but couldn't you just use a choice allowing for only one of an A-B group, an A or a B? Donald Hobern -----Original Message----- From: William Ulate To: TDWG-SDD(a)USOBI.ORG Sent: 23/02/03 00:08 Subject: Re: XML: How to require either or both of two child elements, but prevent both missing? Importance: High 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:choice> </xs:complexType> </xs:element> <xs:element name="elementABopt"> <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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Re: XML: How to require either or both of two child elements, but prevent both missing?
by Jim Croft 23 Feb '03

23 Feb '03

>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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Re: XML: How to require either or both of two child elements, but prevent both missing?
by Hobern, Donald 23 Feb '03

23 Feb '03

Wouldn't this example too would allow for 2 B's? It may be messy (especially if you progress beyond two elements), but couldn't you just use a choice allowing for only one of an A-B group, an A or a B? Donald Hobern -----Original Message----- From: William Ulate To: TDWG-SDD(a)USOBI.ORG Sent: 23/02/03 00:08 Subject: Re: XML: How to require either or both of two child elements, but prevent both missing? Importance: High 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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Re: XML: How to require either or both of two child elements, but prevent both missing?
by Nozomi Ytow 23 Feb '03

23 Feb '03

jrc> How about changing the model to 'choice' and requiring one but allowing two jrc> (or multiple) occurrences of optional elements? jrc> something like this maybe? jrc> <xs:choice minOccurs="1" maxOccurs="2"> jrc> <xs:element name="A" minOccurs="0" maxOccurs="1"/> jrc> <xs:element name="B" minOccurs="0" maxOccurs="1"/> jrc> </xs:choice> Dosn't it alllow the choice whithout A nor B for their minOccurs=0? Substition group would do. Cheers, James

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XML: How to require either or both of two child elements, but prevent both missing?
by Gregor Hagedorn 22 Feb '03

22 Feb '03

How in XML-schema do you make sure that of two possible child elements, either or both, but not neither are present? Parent A Parent B Parent A B should all be ok, but not Parent without either A or B. Attached is a small ZIP file with example files. Paris was a good meeting, I am working on the minutes! Thanks! 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! The following section of this message contains a file attachment prepared for transmission using the Internet MIME message format. If you are using Pegasus Mail, or any another MIME-compliant system, you should be able to save it or view it from within your mailer. If you cannot, please ask your system administrator for assistance. ---- File information ----------- File: ParentChildABProblem.zip Date: 22 Feb 2003, 18:37 Size: 1639 bytes. Type: ZIP-archive

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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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Re: SDD Meeting Paris!
by Hobern, Donald 10 Jan '03

10 Jan '03

Gregor, Do you have any more information about this meeting (agenda, start/end times)? I would like to come, but am under great pressure over the next couple of months, so I'm trying to work out what meetings I really must attend. I am assuming from your note that you have sufficient funds for this meeting, and that any GBIF funds I might apply for SDD might be better used for another meeting later this year. Is this correct? Thanks, Donald --------------------------------------------------------------- Donald Hobern (dhobern(a)gbif.org) Programme Officer for Data Access and Database Interoperability Global Biodiversity Information Facility Secretariat Universitetsparken 15, DK-2100 Copenhagen, Denmark Tel: +45-35321483 Mobile: +45-28751483 Fax: +45-35321480 --------------------------------------------------------------- -----Original Message----- From: Gregor Hagedorn [mailto:G.Hagedorn@BBA.DE] Sent: 20. december 2002 19:04 To: TDWG-SDD(a)USOBI.ORG Subject: SDD Meeting Paris! Dear Colleagues, I know this is slightly unfair, since I have not managed to finish the minutes from Brazil, but: a new meeting is coming up and I would like to announce it to those not present in Brazil: * We plan to meet in Paris on February 13-14th. * The meeting is organized by Nicolas Bailly! If you can come to this meeting, please do so everybody is welcome. The minutes and the xml-schema should be out soon, probably before New Years eve. If anybody would to see them beforehand, I can mail it. Best wishes and merry Christmas to all of you 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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SDD Meeting Paris!
by Gregor Hagedorn 20 Dec '02

20 Dec '02

Dear Colleagues, I know this is slightly unfair, since I have not managed to finish the minutes from Brazil, but: a new meeting is coming up and I would like to announce it to those not present in Brazil: * We plan to meet in Paris on February 13-14th. * The meeting is organized by Nicolas Bailly! If you can come to this meeting, please do so everybody is welcome. The minutes and the xml-schema should be out soon, probably before New Years eve. If anybody would to see them beforehand, I can mail it. Best wishes and merry Christmas to all of you 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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