{"id":1809,"date":"2011-05-26T09:02:39","date_gmt":"2011-05-26T14:02:39","guid":{"rendered":"http:\/\/jianmingli.com\/wp\/?p=1809"},"modified":"2011-05-26T09:06:13","modified_gmt":"2011-05-26T14:06:13","slug":"xslt","status":"publish","type":"post","link":"https:\/\/jianmingli.com\/wp\/?p=1809","title":{"rendered":"XSLT"},"content":{"rendered":"

Overview<\/h2><\/span>\n

* XSL stands for EXtensible Stylesheet Language.
\n* XSLT stands for XSL Transformations
\n* XSLT transforms an XML document into another XML document
\n* XSLT uses XPath to navigate in XML documents
\n* XSLT is a W3C Recommendation<\/p>\n

Top Level Elements<\/h3><\/span>\n

xlt:import and xlt:include<\/h4><\/span>\n

* Both reference another style sheet.
\n* Style sheet imported with xlt:import has lower priority so current style sheet can override imported style sheet.
\n* xlt:import can only appear at the beginning of style sheet.<\/p>\n

xlt:strip-space and xlt:preserve-space<\/h4><\/span>\n
\r\n\r\n\r\n<\/pre>\n
Preserve XML indents<\/h4><\/span>\n
Often times you want to preserve the xml output for readability. Here is how to achieve it.<\/p>\n
<\/pre>\n
xlt:key<\/h4><\/span>\n
xsl:variable<\/h4><\/span>\n
xsl:param<\/h4><\/span>\n
Extend XSLT<\/h2><\/span>\n
You can extend XSLT by
\n* Extension element
\n* Extension function<\/p>\n
XPath<\/h2><\/span>\n
XPath 2.0<\/h3><\/span>\n
* Everything is sequence.
\n* Supports atomic values such xs:integer which can not be broken down to smaller parts.
\n* Supports all build-in data types of XML schema.<\/p>\n
XPath Node Types<\/h3><\/span>\n
* The document node
\n– One per document
\n– No parent
\n* Element nodes
\n* Attribute nodes
\n* Text nodes
\n* Comment nodes
\n* Processing instruction nodes
\n* Namespace nodes<\/p>\n
Node Tests<\/h3><\/span>\n
* node()
\n– Matches any node.
\n* text()
\n– Matches text nodes only.
\n* comment()
\n– Matches comment nodes only.
\n* processing-instruction()
\n– Matches processing instructions only.
\n* NCName:*
\n– Matches all nodes in a particular name space.<\/p>\n
XPath 2.0 Node Tests<\/h4><\/span>\n
* element()
\n– any element
\n– same as select=”*”
\n– element(author): matches any element named author.
\n– element(date-of-birth, xs:gYear): matches any element named date-of-birth with data type of xs:gYear.
\n–  element(*, xs:gYear): matches all elements of data type xs:gYear.
\n* schema-element(author)
\n– Matches any element named author which is declared in schema.
\n* attribute()
\n– same as select=”@*”
\n* *:NCName
\n– Matches all nodes with local name of NCName in any namespace.
\n* document-node()
\n– Matches a document node<\/p>\n
Output Text<\/h3><\/span>\n
* Use xsl:text for more control over white spaces.
\n* Use <xsl:value-of select=””\/> to output values of something.<\/p>\n
\r\n\r\n<\/pre>\n
Branching<\/h2><\/span>\n
* xsl:if
\n* xsl:choose
\n* xsl:for-each<\/p>\n
Invoke Template by Name<\/h3><\/span>\n
\r\n  \r\n     \r\n  <\/xsl:template>\r\n\r\n  \r\n        this is template 1.\r\n  <\/xsl:template>\r\n\r\n  \r\n        this is template 2.\r\n  <\/xsl:template>\r\n<\/pre>\n
Template a la Mode<\/h3><\/span>\n
\r\n  \r\n    \r\n      \r\n        A la templates.\r\n        \r\n        \r\n      <\/body>\r\n    <\/html>\r\n  <\/xsl:template>\r\n\r\n  \r\n      this is a la template 1.\r\n      \r\n  <\/xsl:template>\r\n\r\n  \r\n      this is a la template 2.\r\n      \r\n  <\/xsl:template>\r\n<\/pre>\n
Sample Program To Do XSLT<\/h2><\/span>\n
\r\npackage testxslt;\r\n\r\nimport java.io.File;\r\nimport javax.xml.transform.*;\r\nimport javax.xml.transform.stream.*;\r\n\r\npublic class TestXSLT1 {\r\n    public TestXSLT1() {\r\n    }\r\n\r\n    public static void main(String[] args) throws TransformerConfigurationException, \r\n                                                  TransformerException {\r\n        TestXSLT1 testxslt = new TestXSLT1();\r\n        testxslt.doTransform(\"HelloWorld.xml\",\"HelloWorld.xsl\");\r\n        testxslt.doTransform(\"HelloWorld.xml\",\"HelloWorld2.xsl\");\r\n    }\r\n\r\n    private void doTransform(String xml, String xsl) throws TransformerException, \r\n                                      TransformerConfigurationException {\r\n        Source xmlSrc = new StreamSource(new File(xml));\r\n        Source xsltSrc = new StreamSource(new File(xsl));\r\n        Result result = new StreamResult(System.out);\r\n        \r\n        TransformerFactory tf = TransformerFactory.newInstance();\r\n        Transformer t;\r\n\r\n        t = tf.newTransformer(xsltSrc);\r\n        t.transform(xmlSrc,result);\r\n    }\r\n}\r\n<\/pre>\n
Examples<\/h2><\/span>\n
* Output Indented XML format<\/p>\n
\r\n \r\n<\/pre>\n
* Suppress empty and null nodes<\/p>\n
\r\n\r\n\r\n  \r\n  \r\n  \r\n    \r\n      \r\n    <\/xsl:element>\r\n  <\/xsl:if>\r\n<\/xsl:template>\r\n\r\n\r\n\r\n  \r\n  \r\n<\/xsl:call-template>\r\n<\/pre>\n
References<\/h2><\/span>\n
* XSLT Tutorial<\/a>
\n* Java and XSLT<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Overview * XSL stands for EXtensible Stylesheet Language. * XSLT stands for XSL Transformations * XSLT transforms an XML document into another XML document * XSLT uses XPath to navigate in XML documents * XSLT is a W3C Recommendation Top … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[98],"tags":[],"class_list":["post-1809","post","type-post","status-publish","format-standard","hentry","category-xslt"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/s8cRUO-xslt","_links":{"self":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/1809","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1809"}],"version-history":[{"count":4,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/1809\/revisions"}],"predecessor-version":[{"id":2465,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/1809\/revisions\/2465"}],"wp:attachment":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}