-- this is the header necessary for all tei documents -- -- div elements are used to carry the whole text, and divide it into books and chapters -- -- each div can have a head, and will contain pb cb and lb elements, and ab elements-- --fragmentary divs may also contain gap elements directly -- --id n and type attributes give unique identifiers to each div, and n and type assign numbers and types, distinguishing books and chapters -- -- pb is usually an empty element but may contain margin elements -- -- usually empty, but may contain margin elements -- -- used to indicate text absent, for whatever reason. extent and units attributes indicate: if units is lines then it is vertical material missing, measured in lines; if it is chars, then it is horizontal material missing, measured in characters. extent indicates how many lines/characters -- -- this is an error! -- -- usually empty, but may contain note elements for eusebian canon numbers -- -- used only to hold eusebian canon numbers -- -- used to hold text verses; typically holds w and app elements -- -- hold different readings in rdg elements -- --may hold margin elements nested. Within pb for the start of the page: margin elements may have the attributes topmargin and leftmargin; within pb for the bottom of the page, may have the attributes rightmargin and bottommargin. Within cb for the start of each column: may have attribute coltopmargin; within cb for the end of each column, may have the attribute colbottommargin (not instanced here) margin within margin elements: may have attributes right left center (for topmargin and bottom margin, and coltopmargin and colbottommargin) may have attributes top center bottom (for rightmargin and leftmargin) -- used to hold cross refererenced text , referring to text in the corrections -- -- used to point at corrected element written in margin -- -- may have attributes ul=underline; ol=joined-up-diaeresis; ol2=overline; ul-ol2=overline and underline; red=red; kwhyphen: this appears as an empty element and may be ignored. --