Re: Network Accessable Types

[Ralph Lange <Ralph.Lange@bessy.de>]

Kay-Uwe Kasemir wrote:

> On Jul 26, 2005, at 05:49, Ralph Lange wrote:
>
> > 1. Learning the native type of data is part of the DA interface. The 
> > DA interface is purely about data and does not have any notion of 
> > network transport. An application may access things within a library 
> > or through shared memory using DA without any network involved.
>
> The application should see a data interface
> that allows random access:
> List the properties,
> learn that the 5th property is the "value",
> typed as some sort of number, then fetch it as a double.
> Ask for the "units" property as a string, ...
I don't see your point here, as all this is true for Data Access 
(assuming that the surveyor yields something comprehensive and /not/ 
just empty objects):
- The traverse methods will list properties and types (surveyor)
- The find method will fetch a property by name (the viewer will convert 
it to the format of your local storage)
The knowledge that something is "the 5th" property in a catalog does not 
hold any information, as all access is only by property name/id. Of 
course your app may count and number properties any way it wants. (Data 
Access does not preclude you from counting properties. ;-)
Ralph