[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XML Property Set
> > In my grove-illiterate opinion, yes! The PropertySet is a sword of Damocles > > hanging over these discussions. It's clear that we can't have all 70+ > > properties. IF (and I hope it's not a big IF) we can agree on a subset > > of the property set then we don't have this problem dissipating the > > discussion every time we get close :-) > > It shouldn't be a big IF at all. Deciding what to rip out isn't too difficult. > The only problem lies in agreeing on how to do the additional classes (like > XMLDECL) needed and how (or if) the properties should be modularised. > > > James Clark came up with a grove subset about 3 months back (have a look in > > March xml-dev) in response to one of my typical blunderings for information. > > I'll go back and check that. JamesC would be in a MUCH better position to write > an XML property set than me! Well, I'm going to make an offer. I've spent the better part of a year working on and with a Java-based API for groves. I am certain that I can create an interface from this (if not take it wholesale) for the XAPI and groves. So, my offer is that I can come up with a draft and "the James's" and the lot can validate if I am on the right track. I am fairly certain that at this point in time we should not say "maybe later" to groves. We should standardize parser access, event interfaces, and groves at the same time. We have enough developers with experience in all of these. An API architecture that I propose is: |---------------| | Grove API | |---------------| | Grove Builder | | API | |----------------------------------| | XML Event API | |----------------------------------| | XML Parser API | |----------------------------------| They are described as follows: XML Parser API: Provides interfaces to instantiation and use of XML parsers such that a new XML parser can be integrated with existing application potentially with their knowledge. This might allow a user to configure an application with (in Java) the class name of the XML Factory or whatever. XML Event API: Provides an interface to allow XML parsers to deliver events to arbitrary applications. My suggestion here is that we consider two kinds of APIs or at least constructs. First, there is the idea of the "document string" which is the exact character for character representation of each construct. Second, is a semantic event like "start element". Both are useful depending on what one is doing. Grove Builder API: This API bridges the gap between the event API and a grove. Essentially, the algorithm for building a grove is most likely the same regardless of the implementation technology used to create the grove. Hence, a standard event handler could be defined as well as an interface to allow different grove implementations to be used (for example, a JDBC grove and an in memory grove). Grove API: This API, obviously, provides access to XML groves! Again, my suggestion is that we take advantage of interfaces in XAPI. Interfaces will allow us to mix inheritance hierarchies in the above four APIs. Now, I feel strongly that above APIs or what they become are developed together. They can certain affect how each other is designed. If we have these four APIs, we have the fundamental building blocks for all kinds of XML applications--both simple and complex. In addition, we have the basic infrastructure for DSSSL! (Ah, you can see my motivation now!) ============================================================================== R. Alexander Milowski http://www.copsol.com/ alex@c... Copernican Solutions Incorporated (612) 379 - 3608 xml-dev: A list for W3C XML Developers Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To unsubscribe, send to majordomo@i... the following message; unsubscribe xml-dev List coordinator, Henry Rzepa (rzepa@i...)
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