DTD(Personal Notes)

DTDDTD Defination

Building BlocksElements

<! ELEMENT element-name category>   or <!ELEMENT element-name (element-content)>

Attributes

Enities

PCDATA (Parsed Character Data)

CDATA( Character Data)

DTD Validation

var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");xmlDoc.async="false";xmlDoc.validateOnParse="true";xmlDoc.load("note_dtd_error.xml");document.write("<br>Error Code: ");document.write(xmlDoc.parseError.errorCode);document.write("<br>Error Reason: ");document.write(xmlDoc.parseError.reason);document.write("<br>Error Line: ");document.write(xmlDoc.parseError.line);

Use of Elements vs. Attributes

<note date="12/11/2002">......</note>A date element is used in the second example:<note>  <date>12/11/2002</date>..............</note>An expanded date element is used in the third: (THIS IS MY FAVORITE):<note>  <date>    <day>12</day>    <month>11</month>    <year>2002</year>  </date>.......</note>

Example

<!DOCTYPE NEWSPAPER [<!ELEMENT NEWSPAPER (ARTICLE+)><!ELEMENT ARTICLE (HEADLINE,BYLINE,LEAD,BODY,NOTES)><!ELEMENT HEADLINE (#PCDATA)><!ELEMENT BYLINE (#PCDATA)><!ELEMENT LEAD (#PCDATA)><!ELEMENT BODY (#PCDATA)><!ELEMENT NOTES (#PCDATA)><!ATTLIST ARTICLE AUTHOR CDATA #REQUIRED><!ATTLIST ARTICLE EDITOR CDATA #IMPLIED><!ATTLIST ARTICLE DATE CDATA #IMPLIED><!ATTLIST ARTICLE EDITION CDATA #IMPLIED><!ENTITY NEWSPAPER "Vervet Logic Times"><!ENTITY PUBLISHER "Vervet Logic Press"><!ENTITY COPYRIGHT "Copyright 1998 Vervet Logic Press">]> 

Conclution