Document
    Header stuff (everything before H1)
    GlobalDictionary
    NameIts
    Entities (part of Nls)
    Index
    TOC
    SearchTable
    getPageById()
    Page
        Elements {Text, Tag, Command}
            Previous
            Next
            Children
            Attribute
            
            
parseDocument (builds global dictionary)
buildTOC
buildImageCollection
buildIndex
buildFTS
buildCells
