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<HTML>
<HEAD>
<TITLE>How about a simple example?</TITLE>
</HEAD>
<BODY>
<P><B>Links</B>: <A HREF=extend.html>Next</A> <A HREF=xtrainfo.html>Previous</A> <A HREF=sgmlspm.html>Up</A> <A HREF=sgmlspm.html>Top</A></P>
<H1>How about a simple example?</H1>
<P>OK. The following script simply reports its events:</P>
<P>
<PRE>#!/usr/bin/perl
use SGMLS;
$this_parse = new SGMLS(STDIN); # Read from standard input.
while ($this_event = $this_parse->next_event) {
my $type = $this_event->type;
my $data = $this_event->data;
SWITCH: {
$type eq 'start_element' && do {
print "Beginning element: " . $data->name . "\n";
last SWITCH;
};
$type eq 'end_element' && do {
print "Ending element: " . $data->name . "\n";
last SWITCH;
};
$type eq 'cdata' && do {
print "Character data: " . $data . "\n";
last SWITCH;
};
$type eq 'sdata' && do {
print "Special data: " . $data . "\n";
last SWITCH;
};
$type eq 're' && do {
print "Record End\n";
last SWITCH;
};
$type eq 'pi' && do {
print "Processing Instruction: " . $data . "\n";
last SWITCH;
};
$type eq 'entity' && do {
print "External Data Entity: " . $data->name .
" with notation " . $data->notation->name . "\n";
last SWITCH;
};
$type eq 'start_subdoc' && do {
print "Beginning Subdocument Entity: " . $data->name . "\n";
last SWITCH;
};
$type eq 'end_subdoc' && do {
print "Ending Subdocument Entity: " . $data->name . "\n";
last SWITCH;
};
$type eq 'conforming' && do {
print "This is a conforming SGML document\n";
last SWITCH;
};
}
}
</PRE>
</P>
<P>To use it under Unix, try something like</P>
<P>
<PRE>sgmls document.sgml | perl sample.pl</PRE>
</P>
<P>and watch the output scroll down.</P>
<P><B>Links</B>: <A HREF=extend.html>Next</A> <A HREF=xtrainfo.html>Previous</A> <A HREF=sgmlspm.html>Up</A> <A HREF=sgmlspm.html>Top</A></P>
<ADDRESS>David Megginson <A HREF="mailto:dmeggins@aix1.uottawa.ca"><dmeggins@aix1.uottawa.ca></A></ADDRESS>
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</HTML>
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