"General Purpose XML Processing"

Post #303026310 by bakunin on Saturday 24th of November 2018 02:46:05 AM

Quote:
Originally Posted by rahuldaso
what is the main difference beetween html and xml?
XML is the principle of using markup - "tags" - to denote special parts of a text put into a standardised format: tags are denoted "<tagname>", etc.. (there would be other ways of marking up text, like:

Code:
This is normal text [italic=on]but[italic=off] the last word was different.

which is also using the markup-principle but is not XML.)

HTML is one very specific variety of XML, with a fixed set of tags that can occur and a fixed order of tags that have to be there:

Code:
<body>....</body>
<head>....</head>

would be an error in HTML because the head-tag has to come before the body-tag. In XML this would be perfectly OK because there is no such rule. In fact there is no list of tags which are allowed and no prescribed structure they are allowed to have like there is in HTML.

So, in short: every HTML text is a valid XML text too, but not every XML has to be calid HTML.

I hope this helps.

bakunin
 

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XML::Grove::AsCanonXML(3pm)				User Contributed Perl Documentation			       XML::Grove::AsCanonXML(3pm)

NAME
XML::Grove::AsCanonXML - output XML objects in canonical XML SYNOPSIS
use XML::Grove::AsCanonXML; # Using as_canon_xml method on XML::Grove objects: $string = $xml_object->as_canon_xml( OPTIONS ); # Using an XML::Grove::AsCanonXML instance: $writer = XML::Grove::AsCanonXML->new( OPTIONS ); $string = $writer->as_canon_xml($xml_object); $writer->as_canon_xml($xml_object, $file_handle); DESCRIPTION
"XML::Grove::AsCanonXML" will return a string or write a stream of canonical XML for an XML object and it's content (if any). "XML::Grove::AsCanonXML" objects hold the options used for writing the XML objects. Options can be supplied when the the object is created, $writer = XML::Grove::AsCanonXML->new( Comments => 1 ); or modified at any time before writing an XML object by setting the option directly in the `$writer' hash. OPTIONS
Comments By default comments are not written to the output. Setting comment to TRUE will include comments in the output. AUTHOR
Ken MacLeod, ken@bitsko.slc.ut.us SEE ALSO
perl(1), XML::Parser(3), XML::Grove(3). James Clark's Canonical XML definition <http://www.jclark.com/xml/canonxml.html> perl v5.10.1 1999-10-23 XML::Grove::AsCanonXML(3pm)

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