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- Many thanks Terry for your comments.
-
- > Sorry not to respond sooner to your post of Monday last, pointing
- > out HTML+'s style attribute for PRE. This is okay, but maybe
- > not the most economical approach.
-
- > I think there are two issues: 1) the spec's definition of
- > leading white space and line breaks as significant within PRE,
- > and 2) font changes within PRE. Presently, 1 seems to work just
- > fine (at least in xmosaic and lynx, the two browsers I'm using
- > for trials), so it should not be necessary to institute a <BR>
- > tag to get line breaks within PRE. Outside PRE one shouldn't
- > need them (counterexamples welcome).
-
- One use is for <BR> with <P CENTER> to get some centred lines, but which
- all belong to the same logical paragraph.
-
- > Presently, however, PRE is defined as having typewriter type
- > as its default font, and I think that's wrong. I'd rather have
- > to invoke that font (by <CODE>) explicitly, the default font
- > remaining the same as the main text. That way I don't need
- > an <R> tag, which has also been suggested, and when I
- > have an address to display, I can type:
- > <PRE>
- > Name
- > Address
- > Telephone.
- > </PRE>
- > and get three indented lines in the main text font.
- > I think that if the definition of PRE is changed in this way
- > the style attribute might not be needed.
-
- I'm not sure that most people would agree with your preference to explicitly
- invoking a fixed pitch font.
-
- Rather than an <R> tag, I would like to augment the EMPH rendering hints to
- include additional font types beyond TT. This has a certain feeling of
- completeness to it. The obvious step is to then also include the same font
- attributes in PRE (defaulting to fixed pitch), i.e.
-
- <!ATTLIST PRE
- id ID #IMPLIED -- link destination --
- style CDATA #IMPLIED -- various styles --
- tr (tr) #IMPLIED -- render in serif (Times Roman) font --
- hv (hv) #IMPLIED -- render in sans serif (Helvetica) font --
- width NUMBER #IMPLIED -- e.g. 40, 80, 132 -->
-
- e.g.
- <PRE TR>
- Name
- Address
- Telephone
- </PRE>
-
- With PRE right aligned text would only work in a particular window size.
- PRE stops the browser from being able to adjust margins etc. to get the
- alignment ok for the current window size. I would therefore like to allow
- greater flexibility for normal paragraphs via rendering hints, e.g. your
- example becomes:
-
- <P INDENT>
- Name<BR>
- Address<BR>
- Telephone.
-
- The change to a container model for the P tag ensures that the scope is well
- defined. The style attribute for PRE should be retained so that authors can
- indicate the logical role of the preformatted text in an extensible manner.
-
- On the subject of changing fonts, thanks for your comments on using the SGML
- external entity mechanism.
-
- > We already have character entities in the HTML DTD; all that's
- > needed is to establish how to reference external entity sets not
- > actually included in the HTML+ DTD. SGML rather envisions that
- > the entity files are available locally at run time; for WWW it
- > might be better to be able to indicate the entity files are on
- > the same machine the document is being fetched from.
-
- As far as Latin-1 goes it is a simple matter to map entity definitions to an
- 8-bit ASCII code. More generallt, this breaks down into two parts:
-
- a) mapping the entity name to a character code and char set
-
- b) how to render fonts in this char set (at least for the
- character codes needed for the current document)
-
- It would be neat if we could use outline fonts for this. From the point
- of view of HTML+ all that is needed is (a). The rest is a matter for the
- protocol spec. Perhaps for now we need a mechanism like #INCLUDE that
- works across the network. This could be implemented using the LINK tag.
-
- > And if we can reference external entities, we can do something
- > requested this week in my office: use entities to represent
- > URLs. Than means 1) URLs themselves may be extracted from the
- > main document and collated in a referenced navigational document,
- > and 2) common link types may be generated automatically: for
- > any "Next" link, my &next; entity can refer to a script that
- > looks through a list of filenames, chooses the one after the
- > current file, and returns that as the URL for the target of
- > the link.
-
- Tell me more about the reasons people were asking for this feature.
-
- It seems to me that Next and Previous can be adequately handled using
- the existing framework:
-
- a) defined by LINK elements with REL attribute
- b) sequences defined with the GROUP tag in the parent doc
-
- These will need to be clarified in the RFC for HTML+.
-
- Regards,
-
- Dave Raggett
-
-