[GRASS-user] I'm looking for the web page about vector structure

[Jarek Jasiewicz]

Hi
Few month ago I found on the web interesting web page where topological 
strucutre, relation and hierarchy of vector file were explained with 
detail...

and I lost it...

If somebody knows where the page can be and send me the link I will be 
very gratefull
I found it accidentaly so simple "topology" in google gives no result...

Jarek