[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]
Subject: RE: [emergency] EDXL-DE routing and valueListUrn
Renato has it exactly right. If the identifier resolves to a specific URL only, systems will have difficulty if the URL is down for any reason. But the party responsible for a URN can make the resource available in multiple ways, even sneaker net, if necessary (as is often done when crossing from unclassified to classified systems). Ideally, you might want to associate a URN with a source URL, but only as an authoritative reference, because most of the time using the URL is just a lot of extra work retrieving a foreign source that could be kept locally. For the EDXL-DE, in particular, the value is in the URN as a unique identifier that tells me whether I know how to process the content or not. If I don't know the URN, I cannot do specialized processing. If I do, I can. It is as simple as that. Respectfully, Gary A. Ham Senior Research Scientist Battelle Memorial Institute 540-288-5611 (office) 703-869-6241 (cell) "You would be surprised what you can accomplish when you do not care who gets the credit." - Harry S. Truman -----Original Message----- From: Renato Iannella [mailto:renato@nicta.com.au] Sent: Tuesday, March 21, 2006 7:00 PM To: Ron Lake Cc: Emergency_Mgt_TC TC; David Ellis; SIA Pilot-6; Harry Haury; Haleftiras, Pericles; Carl Reed OGC Account; Glaser, Ronald Subject: Re: [emergency] EDXL-DE routing and valueListUrn On 22 Mar 2006, at 09:41, Ron Lake wrote: > My view is that it should - else how do you know what it means? > In effect you are saying that a URN "resolves" to a text description > somewhere but the somewhere is not defined? Agree, but there is role for unique identifiers. For example, the EDXL-DE XML Schema has this unique identifier: urn:oasis:names:tc:emergency:EDXL:DE:1.0 You could resolve this to a URL (to get the actual XML Schema file) but it does not (yet). It is up to the registrant of the namespace identifier to provide these services. Cheers... Renato Iannella National ICT Australia (NICTA) ------------------------------------------------------------------------ -- This email and any attachments may be confidential. They may contain legally privileged information or copyright material. You should not read, copy, use or disclose them without authorisation. If you are not an intended recipient, please contact us at once by return email and then delete both messages. We do not accept liability in connection with computer virus, data corruption, delay, interruption, unauthorised access or unauthorised amendment. This notice should not be removed. --------------------------------------------------------------------- To unsubscribe from this mail list, you must leave the OASIS TC that generates this mail. You may a link to this group and all your TCs in OASIS at: https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]