Week of 02/24/2008 - 02:00 to 03/02/2008 - 01:59

March Despair.com Posters

The monthly dose.

Category Education


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TMQL Issue: != is not not ==, or is it?

One of the TMQL issues raises the question why there is no != operator when there is a == comparison.

In the following my attempt to explain the reasoning behind that decision. As always, feel free to comment.

Let us look at the simple query expression

select $p / name
   $p /
shoesize >= 42

Apart from trying to solve the answer to Life, the Universe, and Everything \

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CTM, TMQL: Let's define 'undef'

One of the TMQL issues is about the role of undefined and its relationship to null in TMQL.

Here I would like to elaborate a bit on the background why null and undef are two different things and why I think that undef should not only be in TMQL, but actually also in CTM.

TMQL Connection

Let us consider a simple query:

select $p / homepage
   $p isa Person

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TM One Language (to rule them all)

Recently Dmitry made some remarks which got me thinking that we do not have yet the correct approach to the property issue:

Properties are a universal mechanism that can be used for many purposes. One of them is mapping from TMDM representation to "nice" CTM representation. RDF mapping is another one. Mapping to object oriented languages is also simplified with properties.

It is definitely true that - if we had an explicit

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To Call a Spade a Marmelade

I envy marketing people. Honestly. Well, as honest as you can be when talking about marketing people.

Sure, having to retouch text, images and the truth must be stressful at first. But once you have overcome the limits imposed by your self-appreciation, you will find public masturbation not only acceptable but an integral part of your life. Uh, yeah, and that of others.

Which brings me right to the 2005 press release issued when the Bond University IT faculty was merged into the Business faculty. An irrelevant

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