Modes

[Paul Prescod <papresco@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Norm Walsh has shown me a difference between my understanding of the
DSSSL spec and Jade's behaviour. Is this a bug in Jade or my brain?

Basically, my understanding was that if a particular mode did not have a
construction rule for a particular element, the initial mode's
construction rule is used. Here is an example that seems to behave
differently:

in foo.dsl:
----
(root (make scroll))

(element chapter (sosofo-append (with-mode head-mode 
                           (process-first-descendant "TITLE"))
			 (process-first-descendant "TITLE")))

(element emphasis (make element gi: "i"))

(element TITLE
    (make element gi: "title" (process-children-trim)))

(mode head-mode
  (element TITLE
    (make element gi: "title" (process-children-trim))))

Note that emphasis element is not represented in the head-mode mode, soI
would expect it to have the same behaviour inside and outside. Now here
is the document:

foo.sgml
----
<!doctype chapter [
<!element chapter - - (title)>
<!element title - - (#pcdata|emphasis)*>
<!element emphasis - - (#PCDATA)>
]>
<chapter><title>Testing <emphasis>this</emphasis></title>
</chapter>

Finally, here is the output:

<title>
Testing this
</title><title>
Testing <i>
this
</i>
</title>

Why is the emphasis in treated different the first time the title is
processed (in the mode)?

 Paul Prescod