Example Analysis of xml Grammar

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I. document rules

1. Case sensitive.

two。 Attribute values must be enclosed in quotation marks (single or double quotation marks are fine). In general, double quotation marks are recommended.

3. All marks must have a closing symbol.

4. All empty tags must be closed.

5. Must have one and only one element.

6. When parsing white space characters, it is output according to the actual content and will not be abbreviated.

7. Special character handling:

Character substitution character

>

& &

"& quto

'& apos

8. Tag name convention:

a. Can contain letters, numbers, and other characters.

b. Cannot start with a number and an underscore.

c. Cannot start with a character such as xml or Xml.

d. Cannot contain spaces

II. Xml statement

Xml declares standard statements:

Emphasize:

1. "".

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