Alloy uses XML files to define views. We should provide content assist for the elements (tags).
The list of elements is defined as Titanium.UI.* types. There will likely be a need to further refine/filter the subtypes that make sense. Additionally Alloy uses some non-standard namespace mappings for some elements, so there are tags which are not Titanium.UI.* such as Toolbar which is mapped to Titanium.UI.iOS.Toolbar.
Lastly, the root tag is Alloy and you can have <Require> tags.