diff options
Diffstat (limited to 'xml.html.markdown')
| -rw-r--r-- | xml.html.markdown | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/xml.html.markdown b/xml.html.markdown index 059ea132..b95d6088 100644 --- a/xml.html.markdown +++ b/xml.html.markdown @@ -3,11 +3,12 @@ language: xml filename: learnxml.xml contributors: - ["João Farias", "https://github.com/JoaoGFarias"] + - ["Rachel Stiyer", "https://github.com/rstiyer"] --- XML is a markup language designed to store and transport data. -Unlike HTML, XML does not specify how to display or to format data, just carry it. +Unlike HTML, XML does not specify how to display or to format data, it just carries it. * XML Syntax @@ -38,15 +39,16 @@ Unlike HTML, XML does not specify how to display or to format data, just carry i <!-- Above is a typical XML file. It starts with a declaration, informing some metadata (optional). - + XML uses a tree structure. Above, the root node is 'bookstore', which has - three child nodes, all 'books'. Those nodes has more child nodes, and so on... - - Nodes are created using open/close tags, and childs are just nodes between + three child nodes, all 'books'. Those nodes have more child nodes (or + children), and so on... + + Nodes are created using open/close tags, and children are just nodes between the open and close tags.--> -<!-- XML carries two kind of data: +<!-- XML carries two kinds of data: 1 - Attributes -> That's metadata about a node. Usually, the XML parser uses this information to store the data properly. It is characterized by appearing with the format name="value" within the opening @@ -54,8 +56,8 @@ Unlike HTML, XML does not specify how to display or to format data, just carry i 2 - Elements -> That's pure data. That's what the parser will retrieve from the XML file. Elements appear between the open and close tags. --> - - + + <!-- Below, an element with two attributes --> <file type="gif" id="4293">computer.gif</file> @@ -64,25 +66,25 @@ Unlike HTML, XML does not specify how to display or to format data, just carry i * Well-Formated Document x Validation -A XML document is well-formated if it is syntactically correct. +An XML document is well-formatted if it is syntactically correct. However, it is possible to inject more constraints in the document, using document definitions, such as DTD and XML Schema. -A XML document which follows a document definition is called valid, -regarding that document. +An XML document which follows a document definition is called valid, +in regards to that document. With this tool, you can check the XML data outside the application logic. ```xml -<!-- Below, you can see an simplified version of bookstore document, +<!-- Below, you can see an simplified version of bookstore document, with the addition of DTD definition.--> <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE note SYSTEM "Bookstore.dtd"> <bookstore> <book category="COOKING"> - <title >Everyday Italian</title> + <title>Everyday Italian</title> <price>30.00</price> </book> </bookstore> @@ -120,7 +122,7 @@ With this tool, you can check the XML data outside the application logic. <bookstore> <book category="COOKING"> - <title >Everyday Italian</title> + <title>Everyday Italian</title> <price>30.00</price> </book> </bookstore> |