How to create Entity in XML
In this article I have describe about create XML Entity.
How to use entity in XML
An entity is created XML syntax and created by the Document Type Definition (DTD). If we have define a entity in DTD then we use XML documents.
Syntax of defining XML Entity code
- When we define entity then we use <!ENTITY entity Name or definition name.
- Entity name is define the name of entity and definition is define the definition of entity.
<!ENTITY intro "Hello I am MCN Solution"> |
The name of the entity is intro, and definition of entity is "Hello I am MCN Solution".
Using your entity
When we use entity, we also write entity in DTD, and represent by the &entity-name.
Example:
<?xml version="1.0"?>
<!DOCTYPE tutorials [
<!ENTITY footer "Hello I am MCN Solution!">
]>
<tutorials>
<tutorial>
<name>XML Tutorial</name>
<url>https://dotnetheaven.com/article/xml</url>
<footer>&footer;</footer>
</tutorial>
<tutorial>
<name>HTML Tutorial</name>
<url>http://https://dotnetheaven.com/article/xml</url>
<footer>&footer;</footer>
</tutorial>
</tutorials>
|
Code Explanation
-
In this example we want to repeat some text "Hello I am MCN Solution" in our output.
-
Entity "footer" is created &footer to represent the text show for every time.
-
If you want to change the text then we change it in one place-the definition.
-
&footer use to print the message for any position.
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