The WWP does not record absolute type size, accidental variations in type size within a word or line, or intentional variations in type size (for instance, on a display page). We indirectly record the last of these only in the sense that we use a change in type size as an possible indication of a change of element. Although changes in type size (particularly at the word level) may indicate emphasis or different relative importance of individual words or phrases (e.g. on title pages), we do not record the fact of the change in type size, but rather the change of element that it indicates. Note that this policy is slightly different from our treatment of other renditional information: where italics, for instance, indicate a change of element, we record the italicization in the renditional ladder.
The WWP does not record the specific names of different families of type face (e.g. Baskerville, etc.). We do record the general kind of type face (Roman, italic, black letter). This is done by recording the predominant typeface on the rend= attribute of the <text> element and then recording any shifts on the rend= attributes of the elements, using for example rend="slant(italic)" or rend=“face(blackletter)”.
At present there are two separate keywords, slant and face, which are used to record this information. The “slant” keyword records whether the letters are in a roman or an italic face, while “face” records whether they are in blackletter or not. This distinction is somewhat artificial, in the sense that it implies that slant is independent of face, where in fact it is not: there is no such thing as italic blackletter. Thus instead of four possible combinations of these characteristics, in fact there are only three: roman, italic, and blackletter. We are considering adjusting the renditional keywords to reflect this.