Subject: Re: CLASS attribute (Was: No IMG in FIG) Message-Id: <MICHAELJ.firstname.lastname@example.org> From: email@example.com (Michael Johnson) To: firstname.lastname@example.org Date: Fri, 04 Aug 95 12:49:59 EDT Joe English wrote: >email@example.com (Michael Johnson) wrote: > >> I do not think that Dave >> intended CLASS to be used to dynamically define new semantic markup, nor do I >> think it would be a good idea to use it for this. > >Actually, that's precisely what CLASS was designed for. Can you provide references that show that this was the designer's intent? >[description of RENDER and entity hook deleted] >This extension scheme was replaced by the CLASS attribute >(which is more general-purpose and does not require >browsers to parse the DTD on the fly), and <RENDER> >was removed entirely. I can recall some threads about RENDER but the CLASS attribute was not added until long after RENDER went away and was in fact added in place of the STYLE attribute which was there to hook in style sheets. There is of course a gray area in here, since the most meaningful use of the CLASS attribute is going to use some semantically-derived class name: <author class="principle">Joe Author</author> and <author class="collaborator">Fred Kibbitz</author> wrote in Rather than: <author class="red">Joe Author</author> and <author class="yellow">Fred Kibbitz</author> wrote in In general however, those semantics are not going to change the actual meaning of the element. Joe Author and Fred Kibbitz are still both authors. In a case like this: <em class="author,principle">Joe Author</em> and <em class="author,collaborator">Fred Kibbitz</em> wrote in The actual meaning of the element EM has been changed. This is no longer a phrase that should be brought to the attention of the reader. It is now the name of an author, which might or might not need to be brought to the attention of the reader. In my opinion this is a bad way to use the CLASS attribute. To look at it from another angle, you would not expect this: <table class="figure"> To cause the structural element which is a table to be transformed into the structural element that is a figure. The meaning of table should not be changed by a CLASS attribute. Perhaps the presentation of the table contents could change (e.g. the recent discussion of two-dimensional graphic data) but the basic meaning of the element is the same. As it should be. Michael Johnson Relay Technology, Inc.