model
	version
	title
	application+
		name
		version?
		authors?
			author+
				name
				email?
				website?
		description?
			brief
			full?
		since?
		deprecated?
			description
				brief
				full?
		see*
			seeLabel?
			seeModule?
			seeFunction?
		modules
			module+
				name
				version?
				authors?
					author+
						name
						email?
						website?
				behaviour?
				description?
					brief
					full?
				since?
				deprecated?
					description
						brief
						full?
				see*
					seeLabel?
					seeModule?
					seeFunction?
				types?
					type+
						name
						value
						description?
				function*
					name
					spec?
					parameters?
						parameter+
							paramName
							paramType
							description?
								brief
								full?
					return
						returnType
						description?
							brief
							full?
					exported
					description?
						brief
						full?
					since?
					deprecated?
						description
							brief
							full?
					equiv?
						module?
						function
					see*
						seeLabel?
						seeModule?
						seeFunction?
		references?
			usageExamples?
				usageExample+
					href
					role?
					title?
			websites?
				website+
					href
					role?
					title?
			listservers?
				listserver+
					href
					role?
					title?
			newsgroups?
				newsgroup+
					href
					role?
					title?
			books?
				book+
					author
					title
					isbn?
	copyright?

Notes:
- special character's meaning:
	  - * = zero or more
	  - + = one or more
	  - ? = optional
- leaf elements contain text (some of them might be attributes of the 
parent)
- "since" points to an Erlang release, or a version of the parent
- in the "see" element one can have either
	"seeLabel"
	"seeModule" - refers to a module
	"seeFunction" - refers to a local function
	"seeModule"+"seeFunction" - refers to a remote function