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[DPF] Identical names in different namespaces

From: Keith Waters <kwaters@ftrd.us>
Date: Fri, 3 Jun 2005 09:27:06 -0400
To: www-di@w3.org
Message-Id: <F25435F3-9327-4258-9084-37E889705582@ftrd.us>
Hi Jeremy,

This message contains a response to comments on

http://www.w3.org/TR/2004/WD-DPF-20041122/

s5.
Identical names in different namespaces

Figure 2 presents the possibility of the use of identical names
in different namespaces. The intent appears to be that DPF should
provide a framework in which different properties
independently defined by different namespace owners can interoperate.
However, the ECMAScript expressions are unable to distinguish namespaces
and the semantics of an expression like "gps.gps" is unclear for  
figure 2.


To clarify the text and figure have been modified as follows:

Search results may contain properties with the same name and  
namespace values and so appear to be identical. In order to  
disambiguate between the two, it is neccessary to compare their  
parent nodes. For example, there could be two or more GPS systems  
present with the inter-relation show in Figure 2.

[Figure 2. attached]

Figure 2. An example GPS hierarchy.

For example, if getDPFPropertyList were called on the node pictured  
above named C:GPS, with a namespaceURI parameter set to NULL, a  
propertyName parameter set to "GPS", and a deep parameter set to  
"true", the DPFPropertyList returned would contain two properties  
with a namespace of A and a name of GPS. These nodes could be  
disambiguated by comparing their parent attributes.



-Keith Waters


dpf2.png
(image/png attachment: dpf2.png)

Received on Friday, 3 June 2005 13:27:44 GMT

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