RE: xml:href, xml:rel and xml:type
From cited document: "For Web architecture, a design choice has been made that metadata received in an encapsulating container MUST be considered authoritative and used in preference to metadata found by inspection of the data, declared by embedded metadata, or provided by external reference. Although this design choice is generally applicable to any container format, including archival formats that encapsulate other data, the most significant interpretation for Web architecture is that representation metadata found within the header fields of a received message shall be considered authoritative for the representation encapsulated within that message." And that is a system constraint. IOW, on the web/off the web is systemically meaningful and this is why: governing authority at the point of making meaningful choices, deciding probability in advance. Expectations are powerful. Explain to your boss (as I was a few minutes ago) why ID/IDREF relationships are meaningful as XML typed relationships in the XML entity but are NOT hyperlinks and why. Anyone writing a history should devote a chapter or three to this precise issue because almost everything that follows technically after 1996 at the publishing of the MIME/Multipart specification diverges here. The network definition seizes authority over the document itself. It is the system handler taking charge over the content being handled. As long as all that is wanted is a control handler, this is fine. As soon as the data (say href-marked) is applied as a different kind of metadata (eg, to denote an abstract relationship), it goes to complexity hell with question "is this de-referenceable?" being the signpost up ahead and you are in the twilight zone. A description of the contents of the Cheerios box may be litigable but it isn't affective once the cereal is in the bowl of milk. Thus self-descriptive data formats. len -----Original Message----- From: Rushforth, Peter [mailto:Peter.Rushforth@NRCan-RNCan.gc.ca] Sent: Thursday, April 19, 2012 9:51 AM To: John Cowan; Liam R E Quin Cc: Len Bullard; email@example.com Subject: RE: xml:href, xml:rel and xml:type John, If XLink is to support the web , they should be added for sure. Although they are strictly advisory, according to this note http://www.w3.org/2001/tag/doc/mime-respect#metadata-hints Cheers, Peter > -----Original Message----- > From: John Cowan [mailto:firstname.lastname@example.org] On Behalf Of John Cowan > Sent: April 19, 2012 01:58 > To: Liam R E Quin > Cc: Rushforth, Peter; Len Bullard; email@example.com > Subject: Re: xml:href, xml:rel and xml:type > > Liam R E Quin scripsit: > > > Indeed, different HTTP clients (browsers) might receive different > > formats, depending on the Accept: HTTP headers they send. > > Which is why XInclude has xi:include/@accept and > xi:include/@accept-language headers, so that including > documents can specify a particular version of included > documents to try to fetch. > > These could be added to XLink 1.2 if anyone cared. > > -- > Not to perambulate John Cowan <firstname.lastname@example.org> > the corridors http://www.ccil.org/~cowan > during the hours of repose > in the boots of ascension. --Sign in Austrian > ski-resort hotel > _______________________________________________________________________ XML-DEV is a publicly archived, unmoderated list hosted by OASIS to support XML implementation and development. To minimize spam in the archives, you must subscribe before posting. [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ Or unsubscribe: email@example.com subscribe: firstname.lastname@example.org List archive: http://lists.xml.org/archives/xml-dev/ List Guidelines: http://www.oasis-open.org/maillists/guidelines.php
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]
PURCHASE STYLUS STUDIO ONLINE TODAY!
Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!
Download The World's Best XML IDE!
Accelerate XML development with our award-winning XML IDE - Download a free trial today!
Subscribe in XML format