Bush designed conceptually for the time and technology he knew. The concepts have proven to be independent of that time (just as Goldfarb notes that medieval and scholastic glosses are the "original hyperlink concepts"). When any of you go to see the new Time Machine movie, note the familiar look of Babbage's Differential Analyzer in the controls of the movie time machine. Nice touch for a New Yorker. ;-) I agree that the concept of the shared trail, or the sharable set of navigation links is very useful. XLink as the independent links of Hytime make that possible but few take advantage of it. That suggests to me that link sharing in the current mass hypermedia (the web) can achieve that by other means (see the reference lists at the ends of some mails) and that no further compelling or ubiquitous requirements have emerged. Again, not yet. Many things considered YAGNI in one effort become de jure in another. XLinks may not have come to their time. len -----Original Message----- From: W. Hugh Chatfield I.S.P. [mailto:hchatfield@u...] Hmmm... I have access to the WWW.. I have an SQL database... I am aware of the need to multiply link resources on the WWW.. perhaps first described in Vannevar Bush's "As We May Think" article in Atlantic Monthly 1945 - where he envisioned the creation of an external "named trail" that could be shared (although he saw it as linking microfilm frames - but same difference - it was 1945 after all) ( see http://www.itworldcanada.com/portals/portalDisplay.cfm?oid=452AE6D8-0D81-414 3-8F41E0F3C47AEA41...) Yet I still can't build and share these links... Building would take a bit of programming but it seems to me that the sharing part insists on some level of abstraction completely divorced from the underlying implementation technologies. A document I create in "Electric Pencil" can't easily be shared - but if I could save it as XML, then it can more easily. A "Vannevar Trail" I create using some local code using a relational DB system can't be easily shared - but if I could save it as XLink, then it can more easily. So I think you are right... XLink may only be a convenient transport layer (in the same way XML may only be a convenient transport layer for content). Ted Nelson (although he thinks XML is a mistake http://www.xml.com/pub/a/w3j/s3.nelson.html) considered the visible display of links to be of some importance (see http://xanadu.com/cosmicbook/ ). Methinks he is right as well. The real problem seems to be what to do with these things - how to share them - how to process them - how to display them .. not what particular underlying technology could be used for implementation. Cheers...Hugh W. Hugh Chatfield I.S.P. CyberSpace Industries 2000 Inc. XML Consulting & Training -----Original Message----- From: Bullard, Claude L (Len) [mailto:clbullar@i...] Sent: Friday, March 15, 2002 9:23 AM To: 'Leigh Dodds'; xml-dev Subject: XLinks On reading Bob DuCharme's article on "XLinks, Who Cares?" I am struck that he leaves out the argument that is to me a primary reason XLink isn't taking off. Many of us use relational systems on the server that handle metadata relationships in tables. Many of the tasks that an XLink database is good for can be easily handled with a table that contains URLs as database types. Maybe I am just getting foggy in my dotage, but do we need Xlinks if we use relational dbs and if so, for what other than perhaps a convenient transport representation? len ----------------------------------------------------------------- The xml-dev list is sponsored by XML.org <http://www.xml.org>, an initiative of OASIS <http://www.oasis-open.org> The list archives are at http://lists.xml.org/archives/xml-dev/ To subscribe or unsubscribe from this list use the subscription manager: <http://lists.xml.org/ob/adm.pl>
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