We have blocks of XML which represents dialog templates. Here is an example
with 2 buttons and one number edit control:
<dialogex caption="Activity" charset="1" cx="522" cy="348" decplaces="5"
field="activity" fontname="MS Shell Dlg" italic="0" major_version="1"
minor_version="0" ptsize="8" resid="130"
style="DS_SETFONT|DS_MODALFRAME|DS_FIXEDSYS|WS_POPUP|WS_CAPTION|WS_SYSMENU"
type="DIALOGEX" weight="400" x="0" y="0">
<pushbutton caption="OK" cx="63" cy="15" resid="IDOK" style="WS_TABSTOP"
x="453" y="7"/>
<pushbutton caption="Cancel" cx="63" cy="15" resid="IDCANCEL"
style="WS_TABSTOP" x="453" y="28"/>
<editnumber cx="100" cy="12" decplaces="3" field="no_CSP"
formula=".//activity/@LCSP - .//activity/@FCSP + 1" numeric="int"
resid="218" style="ES_AUTOHSCROLL|ES_READONLY|WS_BORDER|WS_TABSTOP" x="84"
y="297"/>
</dialogex>
You can see that the <editnumber> element has an attribute called "formula"
which contains an XQuery expression. This works fine until the XQuery
expression contains something like the following:
"<data>.//activity/@status</data>"
The problem is that Xerces does not like an attribute value that contains
the '<' and '>' characters. When I try to parse the <dialogex> element with
a formula attribute containing the above XQuery expression, it goes wobbly,
and fails.
Does anyone know a way around this? (Of course I could pre-parse the formula
string, and replace all '<' characters with "@@lt" for example, and
similarly for '<', and hope that our formula never needs to contain "@@lt"
and "@@gt". But I'd rather find a more elegant method.)
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