General Purpose XML Processing Post: 303026310

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Top Forums UNIX for Beginners Questions & Answers General Purpose XML Processing Post 303026310 by bakunin on Saturday 24th of November 2018 02:46:05 AM

11-24-2018

Registered User

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

bakunin

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xml::dom::text

XML::DOM::Text(3)					User Contributed Perl Documentation					 XML::DOM::Text(3)

NAME

       XML::DOM::Text - A piece of XML text in XML::DOM

DESCRIPTION

       XML::DOM::Text extends XML::DOM::CharacterData, which extends XML::DOM::Node.

       The Text interface represents the textual content (termed character data in XML) of an Element or Attr. If there is no markup inside an
       element's content, the text is contained in a single object implementing the Text interface that is the only child of the element.  If
       there is markup, it is parsed into a list of elements and Text nodes that form the list of children of the element.

       When a document is first made available via the DOM, there is only one Text node for each block of text. Users may create adjacent Text
       nodes that represent the contents of a given element without any intervening markup, but should be aware that there is no way to represent
       the separations between these nodes in XML or HTML, so they will not (in general) persist between DOM editing sessions. The normalize()
       method on Element merges any such adjacent Text objects into a single node for each block of text; this is recommended before employing
       operations that depend on a particular document structure, such as navigation with XPointers.

   METHODS
       splitText (offset)
	   Breaks this Text node into two Text nodes at the specified offset, keeping both in the tree as siblings. This node then only contains
	   all the content up to the offset point. And a new Text node, which is inserted as the next sibling of this node, contains all the
	   content at and after the offset point.

	   Parameters:
	    offset  The offset at which to split, starting from 0.

	   Return Value: The new Text node.

	   DOMExceptions:

	   o   INDEX_SIZE_ERR

	       Raised if the specified offset is negative or greater than the number of characters in data.

	   o   NO_MODIFICATION_ALLOWED_ERR

	       Raised if this node is readonly.

perl v5.16.3							    2000-01-31							 XML::DOM::Text(3)