element:

Element

In XML DTD we can create an element by using ELEMENT declaration

Syntax:

 <!ELEMENT element_name category>

<!ELEMENT element_name element_content>

(a)    Declare an element that can be empty

 Syntax:

<!ELEMENT element_name EMPTY>

Ex: <!ELEMENT address EMPTY>

(b)   DECLARING AN ELEMENT THAT CAN ACCPET ANY DATA

Syntax:

<!ELEMENT element_name EMPTY>

EX: <!ELEMENT name ANY>

(c)    DECLARING AN ELEMENT THAT CAN CONTAIN pc data

SYNTAX:

  <!ELEMENT element_name(#PC DATA)>

Example:

<!ELEMENT rollno(#PCDATA)>

(d)   Declaring an element containing sequence of child elements

SYNTAX:

 <!ELEMENT element_name(child_name1,child_name2,...)>

Ex:

<!ELEMENT address (rno, colony, city>>

(e)   Declaring an child tag to be present exactly one time

Syntax:

    <!ELEMENT element_name(child_name)>

Ex: <!ELEMENT STUDENT(ROLLNO)>

(f)     Declaring an element that should be present at least one time

SYNTAX:

<!ELEMENT element_name element (childname+)>

Ex: <!ELEMENT institute (student+)>

(g)    Declaring an element that can be present (or) more times

Syntax:

 <!ELEMENT element_name(child_name *)>

<!ELEMENT student(address *)>

(h)   Declaring an element that can be available 0 (or)1 time

Syntax:

 <!ELEMENT element_name(child_name?)>

Ex: <!ELEMENT student(address ?)>

Attributes: