Larsblog

Comparing Topic Maps and RDF

The Topic Maps and RDF technology stacks are quite complex, and it's not easy to see how the various pieces compare. So I thought I'd write a little bit about this. It was Trond's comment that triggered this, but I've seen no end of people struggle with this. I've written about this before, but I think it's possible to do a lot better. So, here goes. ...

Read | 2007-01-06 18:52 | 8 comment(s)

Travels in 2006

Last year I did a Google Map of my travels in 2005, and so of course I wanted to do it again this year. I'd written scripts that built the map from my photo topic map, but they were lost with the old laptop. That meant I had to write them all over again, but the benefit is that they are much cleaner this time around. It gave me a nice, recreational task that didn't require too much concentration to do over Christmas, too. (For more detail on how it was produced, see last year's posting.) ...

Read | 2007-01-06 14:27 | 0 comment(s)

Published subjects and PSIs

People often find the basic idea of published subjects quite clear and simple, but stumble over the detail, so I thought I'd write a little overview over the territory. The idea is to sketch out the basic concepts and how it all works. ...

Read | 2007-01-04 15:25 | 1 comment(s)

A new book on Topic Maps

Those of you who have been waiting for a new Topic Maps book will be happy to hear that one has just been published. It was edited by Naito-san with the contributions of several Japanese people (Komachi-san, at last, but also others), if I read the cover correctly. And, yes, it was written in Japanese, so if, like me, you cannot read Japanese you'll have to settle for looking at the pictures. ...

Read | 2007-01-01 20:15 | 2 comment(s)

Some thoughts on identity

The concept of identity is at the heart of both Topic Maps and RDF, and consequently it has been much discussed over the last few years, but I've seen very little writing on what identity itself actually is. This posting offers some thoughts on that. ...

Read | 2006-12-31 16:26 | 0 comment(s)

The bank is as secure as the user

In the post office today I learned something unexpected about how people use their internet bank accounts. I was going to post some cards and letters, and this being just before Christmas there was quite a queue. I spotted a computer in the office that was obviously set up for customers to use, and started fiddling around with it. ...

Read | 2006-12-20 20:43 | 5 comment(s)

Why XTM 2.0 is different from 1.0

Many people have asked what the changes between versions 1.0 and 2.0 of XTM are, and what the rationales for the various changes are. The actual list of differences can be found in the standard itself, but the standard says nothing about why they were made, and so I thought I would give a quick overview of that here. ...

Read | 2006-12-16 19:17 | 6 comment(s)

An introduction to XTM 2.0

Various people have asked for an introduction to XTM 2.0, since the actual standard is not very easily readable, and so I thought I would provide that. This posting is just a simple walk-through of the syntax with examples. People have also asked for an explanation of the differences with version 1.0, and I'll do a separate posting on that later when time allows. ...

Read | 2006-12-09 14:17 | 0 comment(s)

Ukrainian beer photos

During the Russian/Ukrainian holiday I took a number of beer photos specifically for use when blogging about the beer, but then they were lost, so I did the blog posting with new photos taken at home. Now, of course, most of them are found again, and so I decided to do a piece with just beer photos. I thought about calling it "Ukrainian beer porn", but decided that pictures of industrial pale lager wouldn't be desirable enough to warrant the name "porn". ...

Read | 2006-12-02 12:53 | 13 comment(s)

Moscow

I was rather surprised to find that the largest European city is neither London nor Paris, but rather Moscow. With a population of 10-12 million it is easily the largest city in Europe. And of the great European cities it must also be by far the least visited. I think pretty much every person reading this would recognize the names "Kremlin", "Red Square", and the outline of the St. Vassiliy cathedral, but very few have actually seen these things. ...

Read | 2006-11-18 14:03 | 4 comment(s)

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