XML

XML

XML stands for extensible markup language xml is designed to carry and transport data

Where as Html is just to display data,

Xml can be categorized into 2 types they are

 1.well formed xml

 2.Validate xml

 Rules of an xml

    It should be have opening and closing tags

    Tags should have properly nested

    We can define our own tags

    The root element is called parent element and it should have some child elements(tags)

     Elements are the tag names and attributes are called their values

    

 Well fomed xml should have to follow the above rules

  Validate xml is a well formed xml and it should follow DTD rules and regulations

  Validate xml having two types they are

                                       1.DTD

                                       2.Schema

DTD example

------------------- 

<!DOCTYPE note
[
<!ELEMENT note (to,from,heading,body)>
<!ELEMENT to (#PCDATA)>
<!ELEMENT from (#PCDATA)>
<!ELEMENT heading (#PCDATA)>
<!ELEMENT body (#PCDATA)>
]>

      

Schema example

<xs:element name="note">
<xs:complexType>
  <xs:sequence>
    <xs:element name="to" type="xs:string"/>
    <xs:element name="from" type="xs:string"/>
    <xs:element name="heading" type="xs:string"/>
    <xs:element name="body" type="xs:string"/>
  </xs:sequence>
</xs:complexType>
</xs:element>