Previous client API that appeared in 1.2.8 was written by Ivan Gudym and allowed creation of Apache frontend. The problem with that API is it was tightly integrated with templates, so it was unable to go for output customization by other means that standard ASPseek templates. This API is designed to be more flexible.
I do not yet decided should we apply changes to current 1.2.9pre or branch 1.3 unstable series...
FOAF updates: Trust rankings are now exported, making the data available to other users and websites. An external FOAF URI has been added, allowing users to link to an additional FOAF file.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!