[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: Query Languages for XML

• From: "Martin Bryan" <mtbryan@s...>
• To: <xml-dev@i...>
• Date: Mon, 17 Nov 1997 15:58:59 -0000

Joe Lapp wrote:

>I agree that under the appropriate circumstances you wouldn't have
>to lock the whole document.  However, were you to do the trick with
>what is currently XSL, it seems to me that you would have to create
>a _replacement_ document and then replace the original document.

This presumes that the "document" is the thing you want to remove. What if:

a) the document was built from a set of entities?
b) only part of the document consisted of updatable data fields?

The key factor is "what proportion of the data needs to be modified?"

>If in the time between reading the original and generating the
>replacement another user reads the original, and if you the other
>user posts his replacement after you post your replacement, then
>your changes do not take.

Always a problem with databases, but fields that are "temporarily locked"
can always be assigned an attribute that the presentation software can use
to indicate that the data is in a state of flux to read-only users of the
data during the update period.

>Or maybe you are suggesting there is no need to replace the whole
>document using an XSL approach.  XSL or some other XML standard would
>need to define a standard mechanism for identifying and modifying a
>portion of a document.

The XML/EDI crew will be looking into this problem as it is key to running
an electronic business using XML.

> I am aware of some sort of 'chunking'
>initiative, but I don't know exactly what the scope of the effort is.

Why not join the XML/EDI research teams (see http://www.xmledi.net for
details)



xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i...
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo@i... the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@i... the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@i...)

• Follow-Ups:
  • Re: Query Languages for XML
    • From: Joe Lapp <jlapp@a...>

• Prev by Date: Re: Query Languages for XML
• Next by Date: Re: Query Languages for XML
• Previous by thread: Re: Query Languages for XML
• Next by thread: Re: Query Languages for XML
• Index(es):
  • Date
  • Thread