Re: A simple notation, again

Brian Selzer wrote:
[...]

>> You imply order (adjacency) when relation attributes should not be
>> subjected to any....
>>
>>

I've been playing with Dee (http://www.quicksort.co.uk/) on and off for a while and there it is possible to do it /both/ ways:

http://www.quicksort.co.uk/DeeDoc.html#relations

To assign a relation value to a relation variable, use the standard Python syntax, e.g.

 >>> IS_CALLED = Relation(["StudentId", "Name"],

...                     [{"StudentId":'S1', "Name":'Anne'},
...                      {"StudentId":'S2', "Name":'Boris'},
...                      {"StudentId":'S3', "Name":'Cindy'},
...                      {"StudentId":'S4', "Name":'Devinder'},
...                      {"StudentId":'S5', "Name":'Boris'},
...                     ])

[...]

or alteratively, a more concise option is available which relies on the order of the body attributes matching the order of the heading:

 >>> IS_CALLED = Relation(["StudentId", "Name"],
...                     [('S1', 'Anne'),
...                      ('S2', 'Boris'),
...                      ('S3', 'Cindy'),
...                      ('S4', 'Devinder'),
...                      ('S5', 'Boris'),
...                     ])

Since I'm a lousy typist I tend to use the latter ;-)

/Lennart Received on Wed Jul 18 2007 - 14:52:32 CDT