XLink is used to create hyperlinks in XML documents.
There is no browser support for XLink in XML documents.
However, all major browsers support XLinks in SVG.
XQuery is to XML what SQL is to databases.
XQuery was designed to query XML data.
for $x in doc("books.xml")/bookstore/book
where $x/price>30
order by $x/title
return $x/title
With XSLT you can transform an XML document into HTML.
XSLT (eXtensible Stylesheet Language Transformations) is the recommended style sheet language for XML.
XSLT is far more sophisticated than CSS. With XSLT you can add/remove elements and attributes to or from the output file. You can also rearrange and sort elements, perform tests and make decisions about which elements to hide and display, and a lot more.
XSLT uses XPath to find information in an XML document. Continue reading XML and XSLT
XPath is a major element in the XSLT standard.
XPath can be used to navigate through elements and attributes in an XML document.
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XPath uses path expressions to select nodes or node-sets in an XML document. These path expressions look very much like the expressions you see when you work with a traditional computer file system.
XPath expressions can be used in JavaScript, Java, XML Schema, PHP, Python, C and C++, and lots of other languages.
The Document Object Model (DOM) defines a standard for accessing and manipulating documents:
The HTML DOM defines a standard way for accessing and manipulating HTML documents. It presents an HTML document as a tree-structure.
The XML DOM defines a standard way for accessing and manipulating XML documents. It presents an XML document as a tree-structure.
Understanding the DOM is a must for anyone working with HTML or XML.
All major browsers have a built-in XML parser to access and manipulate XML.
The XML DOM (Document Object Model) defines the properties and methods for accessing and editing XML.
However, before an XML document can be accessed, it must be loaded into an XML DOM object.
All modern browsers have a built-in XML parser that can convert text into an XML DOM object.
All modern browsers have a built-in XMLHttpRequest object to request data from a server.
The XMLHttpRequest object can be used to request data from a web server.
The XMLHttpRequest object is a developers dream, because you can:
Raw XML files can be viewed in all major browsers.
Don’t expect XML files to be displayed as HTML pages.
<?xml version="1.0" encoding="UTF-8"?>
- <note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
Most browsers will display an XML document with color-coded elements.
Often a plus (+) or minus sign (-) to the left of the elements can be clicked to expand or collapse the element structure.
To view raw XML source, try to select “View Page Source” or “View Source” from the browser menu.
Note: In Safari 5 (and earlier), only the element text will be displayed. To view the raw XML, you must right click the page and select “View Source”. Continue reading Displaying XML
XML Namespaces provide a method to avoid element name conflicts.
In XML, element names are defined by the developer. This often results in a conflict when trying to mix XML documents from different XML applications.
This XML carries HTML table information:
<table> <tr> <td>Apples</td> <td>Bananas</td> </tr> </table>
This XML carries information about a table (a piece of furniture):
<table> <name>African Coffee Table</name> <width>80</width> <length>120</length> </table>
If these XML fragments were added together, there would be a name conflict. Both contain a <table> element, but the elements have different content and meaning.
A user or an XML application will not know how to handle these differences. Continue reading XML Namespaces
XML elements can have attributes, just like HTML.
Attributes are designed to contain data related to a specific element.
Attribute values must always be quoted. Either single or double quotes can be used.
For a person’s gender, the <person> element can be written like this:
<person gender="female">
or like this:
<person gender='female'>
If the attribute value itself contains double quotes you can use single quotes, like in this example:
<gangster name='George "Shotgun" Ziegler'>
or you can use character entities:
<gangster name="George "Shotgun" Ziegler">