Extremely Fast Text Feature Extraction for Classification and Indexing


 
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Old 08-22-2008
Extremely Fast Text Feature Extraction for Classification and Indexing

HPL-2008-91R1 Extremely Fast Text Feature Extraction for Classification and Indexing - Forman, George; Kirshenbaum, Evan
Keyword(s): text mining, text indexing, bag-of-words, feature engineering, feature extraction, document categorization, text tokenization
Abstract: Most research in speeding up text mining involves algorithmic improvements to induction algorithms, and yet for many large scale applications, such as classifying or indexing large document repositories, the time spent extracting word features from texts can itself greatly exceed the initial trainin ...
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XML::DOM::Text(3pm)					User Contributed Perl Documentation				       XML::DOM::Text(3pm)

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 con- tent at and after the offset point. Parameters: offset The offset at which to split, starting from 0. Return Value: The new Text node. DOMExceptions: * INDEX_SIZE_ERR Raised if the specified offset is negative or greater than the number of characters in data. * NO_MODIFICATION_ALLOWED_ERR Raised if this node is readonly. perl v5.8.8 2008-02-03 XML::DOM::Text(3pm)