RE: [obix-xml] Metadata

Title: Metadata

I looked further into WS-Metadata and this is what I 
came away with:  It ties together the independant specifications used by a 
service.  For 
example, learning about a service's security policy.  
This would be very useful to an oBIX 
implementor.  However, it really doesn't have anything to do with us 
referencing other services from within our service.  It 
looks as if the focus should be on WS-Addressing or rolling our 
own.

 

The real issue is what 
do we want to do with service references.  In my opinion, we are developing 
a reusable discovery service for other services and a way to tie together 
best-of-breed services for a 
building(s).

 

  
-----Original Message-----
From: Doug Ransom 
  [mailto:]
Sent: Wednesday, September 22, 2004 
  12:41 PM
To: OBIX XML
Subject: [obix-xml] Metadata 
  

  
If our goal for next meeting is to think about how 
  we convey point or object metadata and it might be used for reflection-like 
  services, I think it is useful to note the following are available on most 
  platforms that support XML and Web Services: 

  
    
APIs to process XML Schemas, RelaxNg Schemas, 
    and WSDL to create data structures and objects that can be invoked (as 
    opposed to simply validation) 
    
Schematron implementations, which can be used to 
    express constraints about data that XML Schema or WSDL cannot 
    
XPATH, which a lot of web service specs seem to 
    mention 
    
XSLT 

  
and we discussed WS-Metadata earlier 
  today. 

  
I think it is helpful to be familiar 
  with all of these technologies so we can map them onto use cases or take ideas 
  from them as appropriate.

  
Doug Ransom 
Energy Analytics Domain Expert 
Power Measurement 
2195 Keating Cross Road 
Saanichton, BC, Canada  V8M 2A5 
Tel: (250) 652-7100  ext. 7558 
Fax: (250) 652-0411 
E-Mail: 
  mailto: 
Website: 
  http://www.pwrm.com 
  
ION®  
  smart energy everywhere™