Magsvento has several references for Magento.

Magento Layout Files Reference: This reference documents Magento’s layout files, i.e. the XML files in a app/design/frontend/<your interface>/<your theme>/layout folder. There’s a complete list of layout handles, e.g. default, for every layout file, e.g. page.xml. More importantly, this reference covers all of the XML elements, including their attributes and common values. If possible, examples are given for each element or attribute to further clarify their usage.