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[2]W3C [3]CSS Validation Service

   Check Cascading Style Sheets (CSS) and (X)HTML documents with style sheets

Download and Install the CSS Validator

Download the CSS Validator

   The CSS validator is available in three different packaging: from Git for
   developers who want the very latest version, as a jar archive to build
   applications and for use as a command line tool, and (since 2009) as a war
   archive for server-side applications.

Download the source code

   The [4]source of the CSS Validator can be retrieved with Git. Please note that
   the online service for the CSS validator is a stable release, generally a little
   older than the version under Git, and their results and behaviour may differ.

Download the Java archive (jar)

   [5]css-validator.jar

Installation Guide

   The CSS Validation service is based on a servlet written in the cross-platform
   Java language, and can be installed on any servlet platform. While the official
   service from W3C runs under the Jigsaw server (which is the recommended setup),
   we will for the sake of convenience describe in this guide the setup under
   Apache's servlet engine, Tomcat, as well as some quick instructions for Jigsaw
   and commandline usage.

Prerequisites

   This guide assumes that you have already downloaded and installed successfully
   the following:
     * a working java environment ;
     * the [6]Ant java build tool ;
     * a Java servlet container such as [7]Jigsaw, [8]Tomcat or [9]Jetty, if you
       plan to provide the validator as a web service.

   As a prerequisite to the installation, you will need to know the complete path to
   the java library called servlet.jar. It is generally available within
   [TOMCAT_DIR]/common/lib/, with [TOMCAT_DIR] being the path under which Tomcat is
   installed. It may also be found under the name servlet-api.jar. If you can not
   find it, [10]java.sun.com will have it.

Installation of the CSS validator under Tomcat

    1. Download the Git source as explained [11]above ;
    2. Edit the file called [VALIDATOR_DIR]build.xml and replace the value of
       property servlet.lib with the full path to servlet.jar
    3. You can now build the source : from [VALIDATOR_DIRrun the command ant war.
       Running ant should download a number of necessary libraries, and build the
       archive called css-validator.war.
    4. Copy or move css-validator.war to [TOMCAT_DIR]/webapps.
    5. Finally, restart the Tomcat engine :
       "cd [TOMCAT_DIR]; ./bin/shutdown.sh; ./bin/startup.sh;"

Installation of the CSS validator under Jigsaw

    1. Download the Git source as explained previously, save it under
       [JIGSAW_DIR]/WWW and build source with ant jigsaw ;
    2. Next, configure the root folder for the validator (in most cases it will be
       called css-validator) to make it a servlet container. Within your Jigsaw
       installation, launch the Jigsaw Admin utility, browse to css-validator and
       change it from HTTPFrame to ServletDirectoryFrame ;
    3. The next step will be to create a "validator" resource as 'ServletWrapper'
       class. A 'ServletWrapperFrame' frame will automagically be created for it.
       You will need to provide the name of the servlet class, which for the CSS
       Validator os org.w3c.css.servlet.CssValidator. Note that a file called
       "validator" may already be present - you MUST rename it, as the validator
       absolutely needs to enforce this name for the servlet wrapper ;
    4. Make sure that all the .jar libraries within the
       [JIGSAW_DIR]/WWW/css-validator/lib folder are properly added to Jigsaw's
       CLASSPATH setup.
    5. Finally, restart Jigsaw and point your browser to the validator. The URI
       should be something like :
       http://localhost:8001/css-validator/validator.html

Command-Line use

   Any computer with Java installed can also run the validator from the
   terminal/console as a commandline tool. Download the css-validator.jar jar
   archive (or build it with ant jar) and run it as :
   java -jar css-validator.jar http://www.w3.org/.

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References

   1. http://jigsaw.w3.org/css-validator/
   2. http://www.w3.org/
   3. http://jigsaw.w3.org/css-validator/
   4. https://github.com/w3c/css-validator
   5. http://www.w3.org/QA/Tools/css-validator/css-validator.jar
   6. http://ant.apache.org/
   7. http://www.w3.org/Jigsaw/
   8. http://tomcat.apache.org/
   9. http://www.mortbay.org/
  10. http://java.sun.com/products/servlet/DOWNLOAD.html
  11. https://jigsaw.w3.org/css-validator/DOWNLOAD.html#source
  12. http://jigsaw.w3.org/css-validator/
  13. http://jigsaw.w3.org/css-validator/about.html
  14. http://jigsaw.w3.org/css-validator/documentation.html
  15. http://jigsaw.w3.org/css-validator/Email.html
  16. http://jigsaw.w3.org/css-validator/thanks.html
  17. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.bg
  18. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.de
  19. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.en
  20. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.es
  21. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.fr
  22. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.ko
  23. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.it
  24. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.nl
  25. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.ja
  26. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.pl-PL
  27. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.pt-BR
  28. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.ru
  29. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.sv
  30. http://jigsaw.w3.org/css-validator/DOWNLOAD.html.zh-cn
  31. http://www.w3.org/QA/
  32. http://www.w3.org/Style/CSS/learning
  33. http://www.w3.org/QA/Tools/Donate
  34. http://www.w3.org/Consortium/Legal/ipr-notice#Copyright
  35. http://www.w3.org/
  36. http://www.csail.mit.edu/
  37. http://www.ercim.eu/
  38. http://www.keio.ac.jp/
  39. http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer
  40. http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks
  41. http://www.w3.org/Consortium/Legal/copyright-documents
  42. http://www.w3.org/Consortium/Legal/copyright-software
  43. http://www.w3.org/Consortium/Legal/privacy-statement#Public
  44. http://www.w3.org/Consortium/Legal/privacy-statement#Members