Python uses xslt to extract webpage data, and pythonxslt to extract webpage data
1. Introduction
In the Python web crawler Content Extraction Tool article, we have explained in detail the core components: pluggable Content Extraction Tool class gsExtractor. This article records the programming experiments performed in the process of determining the technical route of gsExtractor. This is the first part. We used xs
:
Sablot
Iconv
Expat
You can find these libraries in Ruby-sablotron.
xslt4r
xslt4r is written by Michael Neumann. XSLT4R is used for simple command-line interactions that can be used by Third-party applications to transform XML documents.
XSLT4R requires Xmlscan operations, including XSLT4R archiving, which is a 100% ruby module. These modules can be installed using a standard Ruby installation method (that is, Ruby Install.rb).
T
Address: http://www.w3schools.com/xsl/xsl_w3celementref.aspTranslator: Tony QuXSLT Element reference
W3C XSLT element (XSLT 1.0 ).
XSLT Element
The Element column contains attributes. You can use hyperlinks to obtain more useful information about each attribute.
NN: The tag is supported in earlier versions of Netscape.
IE: This label is supported in earlier
XSL
XSL is for XML, just like CSS for HTML. It refers to the Extensible Stylesheet Language ). This is a language used to present XML data in a readable format. XSL actually contains two parts:
* XSLT-language used to convert XML documents
* XPath-language used for navigation in XML documents
XSLT refers to XSL Transformation (XSL transformation), which is the mo
Why extend the XSLT style sheet function?
The XML-based Extensible style sheet language XSL and its conversion XSLT implement the conversion of XML source files from one format to another. By defining a series of rules-compliant templates in the XSL file, the XML document that matches these templates can be converted to HTML page files that can be displayed, XML files that meet other needs, or file
What is XSLT?
----- Extended style form language conversion [Extensible Stylesheet Language Transformations (XSLT)] ----
---- Extended Markup Language [Extensible Stylesheet Language (XSL)] ---------
XSLT has developed early XSL language standards.
For XML data descripti
The basic format for parsing using xslt is as follows:Xmlns: xsl = "http://www.w3.org/1999/XSL/Transform">// Some xhtml labels can be contained hereXSL refers to the EXtensible Stylesheet Language. xsl is an xml style table. xsl consists of three parts: xslt (a Language used to convert XML documents) x-path (a language used for navigation in XML documents) and xs
during processing, these objects are associated with specific platforms, which requires the platform to have a built-in processor to process object operations. XML is already W3C standard and platform-independent. The only requirement of our computer is to be able to process simple XML strings, that is, the XML parser, which can parse XML strings, data can be easily divided into independent data segments through an interface so that we can access the data. The XML parser is very small and has g
XML involves a series of technical specifications and related technologies, with many and complex concepts. Here, we will briefly introduce four concepts: XPath, XSLT, XQuery, and xqueryx, which are W3C specifications.
XPath is the XML Path Language. XPath provides general syntax and semantics for locating and linking information in an XML document. It is an expression language that can be used to easily identify nodes in XML documents. XPath is de
recordsets are objects that can degrade computer performance when processed. And these objects are associated with a particular platform, which requires that the platform has built-in processing mechanisms to handle the object's operations. XML is already the standard of the consortium, is platform-independent, our computer's only requirement is to be able to handle simple XML strings, that is, XML parser, it can parse XML strings, can easily decompose the data into separate data segments throu
Using ASP to process XSLT transformation XML is simpler, as follows: Create a Xsltemplate object, then create a Xmldom object, and then in the home XML file and XSLT file, the last use method transform can be included in the class, the specific code is as follows:
The following is a reference fragment:
Class Cls_xml_transformPrivate linput,xsltemplatePrivate P_outputPublic Property Get Output ()Output = P
NowIn, many applicationsProgramUse XMLAnd the data may be distributed in different places. In actual use, XML data of these distributions must be expressed in different views. The style sheet provides business data and representation.The Separation Method of layer, as a tool for XML data conversion, can be expressed through XML data. A style sheet can present distributed XML data in a certain view.The problem is how to generate multiple style sheets acting on distributed XML data to generate dif
HTTP://MSDN.MICROSOFT.COM/EN-US/LIBRARY/533TEXSX (vs.71). aspx#y1338: View Application
XSLT is applied to parsing XML files, and in asp.net programming, XML controls can be used to specify DocumentSource properties to load XML files. Specifies the TransformSource property to load the XSLT file, and the XML control automatically displays the converted results on the page.
Speaking of XML, let's talk about XSLT
What is this XSLT thing? What's the use? And how to use it?
You can observe the RSS document just now, although the content information is displayed, but its readability is relatively weak, generally want to use the way of the Web page intuitive view.
Then the XML has been puzzled and the love of HTML friends, may ask: Since the use of visual display of the Web
The copy and copy-of structures are used to copy nodes. The copy element only copies the current node without any nodes or attributes. But copy-of is all copied.
XSLT stylesheet 1
XML source codeOutputCompare Compare these constructs.View in HTMLCopy-:CompareThese constructs.Copy:Value-:Compare these constructs.
XSLT
series (4)
XML tutorial series (5)
XML classic tutorial
Use System. XML to read and write XML documents
"The XML page cannot be displayed in ASP. net2.0. XML input cannot be viewed using the XSL style sheet. "Problem Solving
Openxml: insert barchart chart in Excel
Use xmlreader to read Excel 2007 files
Treeview
Winform: Use the webbrowser to display XML with XSLT, XML, and XSLT to con
650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/80/29/wKiom1c5kzmwIWExAAEimWIMhCk711.png "title=" Soft Wen 02.png "alt=" Wkiom1c5kzmwiwexaaeimwimhck711.png "/>lxml is a library of Python that can handle XML quickly and flexibly. It supports XML Path Language (XPath) and extensible Stylesheet Language Transformation (XSLT), and implements common ElementTree APIs. This 2-day test is to extract the
Web: http://www.w3school.com.cn/xsl/xsl_w3celementref.asp XSLT Element
For more details about the following elements, click the link in the element column.
N: indicates the earliest Netscape version that supports this label.
IE: indicates the earliest version of Internet Explorer that supports this label.
Note:Elements supported in IE 5 may have non-standard behaviors because IE 5 was released before
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