A keywords system allows to insert links with tooltips for skills or items.
Here is a [http://www.diabloz.com/en/character-build/example0 build example].
Here is a The [http://www.diabloz.com/en/characterstuff-buildanalyzer/example0 build examplestuff analyzer]allows to load a hero stuff and compare each item properties with theoretical maximums, in view to identify gear strength and weakness.