taxonomy

I created a custom taxonomy named 'technologies' but cannot query multiple terms like I can with categories or tags. These querys DO work: query_posts('tag=goldfish,airplanes'); query_posts('technologies=php'); However, neither of the following work correctly: query_posts('technologies=php,sql'); query_posts('technologies=php&technologies=sql'); My objective: Show all posts with a technology of 'php' and all posts with a technology of 'sql' Any ideas? Is this even possible? Thanks! Apparently query_posts cannot help in this specific situation. (Hopefully it will be added in future versions of

we often see 'related items'. For instance in blogs we have related posts, in books we have related books, etc. My question is how do we compile those relevency? If it's just tag, I often see related items that does not have the same tag. For instance, when search for 'pink', a related item could have a 'purple' tag. Anyone has any idea? There are many ways to calculate similarity of two items, but for a straightforward method, take a look at the Jaccard Coefficient. http://en.wikipedia.org/wiki/Jaccard_index Which is: J(a,b) = intersection(a,b)/union(a,b) So lets say you want to compute the