Categories were introduced in 2003 and are celebrating their 8th anniversary this year. One thing that I would like to do in Wikipedia is: A category that spans a scale, e.g. people by date of birth. Today we use [[Category:1823 births]] to group people born in that year, where the category page has links to the previous and next year, and possibly to supercategories by decade or century. I would like to index people by birth *date* along a timeline, from where any subsection could be listed. Some kind of {{#select: ...}} could be used to find a subsection from this index. Instead of category pages, some continuously scrolling page should be used. Just like Google Maps, when you scroll one way, new content should be retrieved by API, and presented in the same Javascript scrolling page. Maybe "category" is the wrong word to describe this function, but today we use categories because we have no better way. A possible extension is 2-dimensional ranges, for geographic coordinates. Does any extension like this already exist? -- Lars Aronsson (lars(a)aronsson.se) Aronsson Datateknik - http://aronsson.se