Tasks of the Debian Science Blend
Technically a Debian Pure Blend builds a set of metapackages and provides an overview about the packages which are included and which are on the todo list for further inclusion. Both pages are rendered from the information inside the tasks files in SVN.
What is a Debian Pure Blend? http://blends.alioth.debian.org/blends
The wiki page: http://wiki.debian.org/DebianPureBlends