| Example 1 |
XML document must contain one or more elements.
|
| Example 2 |
There is exactly one element, called the root, or document element, no part of which appears in the content of any other
element.
|
| Example 3 |
The name in an element's end-tag must match the element type in the start-tag. Names are case-sensitive
|
| Example 4 |
If the start-tag is in the content of another element, the end-tag is in the content of the same element. More simply stated,
the elements, delimited by start- and end-tags, nest properly within each other.
|
| Example 5 |
The end of every element that begins with a start-tag must be marked by an end-tag containing a name that echoes the element's
type as given in the start-tag. The text between the start-tag and end-tag is called the element's content. An element without
content can take a special form: <name/> . The slash before > substitutes the end tag.
|
| Example 6 |
Element names can contain letters, digits, hyphens, underscores, colons, or full stops. A colon can be used only in a special
case where it separates so called namespace. Element names starting with xml, XML or other combination of cases of this string
are reserved for the standard.
|
| Example 7 |
An element can have none, one or several attributes. Permitted characters are the same as for element names. The name of attribute
is separated from its value by =. The attribute value must be given inside apostrophes '...' or double-quotes "..." . If
an apostrophe or double-quote is used in the attribute value the opposite delimiter must be used.
|
| Example 8 |
Characters < and & cannot be used in text as they are used in markup. If these characters are needed < must be used insted
of < and & instead of &
|
| Example 9 |
Characters >, " , and ' can be also substituted by > , " and ' , respectively
|
| Example 10 |
Comments may appear anywhere in a document outside other markup. An XML processor may, but need not, make it possible for
an application to retrieve the text of comments. The string "--" (double-hyphen) must not occur within comments.
|
| Example 11 |
Processing instructions (PIs) allow documents to contain instructions for applications.
|
| Example 12 |
CDATA sections are used to escape blocks of text containing characters which would otherwise be recognized as markup. CDATA
sections begin with the string "<![CDATA[" and end with
the string "]]>". The string ']]>' must not occur inside CDATA section.
|
| Example 13 |
XML documents may, and should, begin with an XML declaration which specifies the version of XML being used.
|