Document Type Definition (DTD)

A DTD defines a set of rules used to validate documents against the DTD. In particular, the DTD defines the overall structural requirements of the XML documents. The purpose of the DTD is to define the format of the XML documents so that they can be read by computers without human intervention. The DTD also serves as a guide for validating the XML documents against the DTD itself. An example of a DTD would be one defining the format of a word processing file.

Elements,file,doctype,specification,document type definition,entities,root element,notations,schema,syntax,XML files,parsers,version,XML document,identifiers,external file,document type declaration,element type.

Element and attribute-list declarations,public identifiers,subsets,error,model,Attribute-list declarations,ELEMENT phone,ELEMENT address,Element type declarations,ELEMENT body,element declarations,ELEMENT note,external entities.

Internal entities,type ENTITY,DOCTYPE note,internal subset,namespace-aware version,version of DTDs,tokens,space,XML processors,values,ISO/IEC,constraints,source,runs of character data,ISO DSDL,ISO SGML standard effort,special publishing characters,document types,XML declaration,external declaration,attribute type,Numeric character references.

Valid element,ELEMENT gender,ELEMENT person,ELEMENT img,ELEMENT sgml,element attribute,element contents,element namedname,replacements for element declarations,type of elements,current element,distinct elements,ELEMENT birthday,ELEMENT company,ELEMENT email,ELEMENT month,document element,documents via element,single top-level element,type of children elements,document entity,entity replacement,ENTITY attributes,entity declarations,ENTITY type,external parameter entities,literal entity,parameter entity references,predefined character entities,– parsed external entity,ENTITY example1GIF,ENTITY example1SVGTitle,img data ENTITY,unparsed entity,aninternal entity,internal entity declaration,notation names,additional notation,notation name “type-image-svg,notation name declarations,uniqueness of notation name,Unrecognized notations,NOTATION example1SVG,NOTATION type-image-gif PUBLIC “image/gif,NOTATION type-image-svg PUBLIC,NOTATION type-vendor-specific PUBLIC “application/VND.specific+sgml,sgml type NOTATION,XML schema languages,XML Schema Definition,schema of XML documents,schema languages).Most XML schema,schema validation[edit]The XML DTD,XML schema,valid identifier,OS-specific object identifier,external identifier,specialized identifier,correct syntax,effective XML syntax,XML DTD syntax,XML syntax parsing,document syntax,differently-named text file,arbitrary files,DOCTYPE declaration,DOCTYPE address,DOCTYPE html PUBLIC,subset of documents,external subsets,SGML parsers,non-validating parser,non-validating XML parsers,future versions,lexical tokens,unparsed tokens,valid name token,white space,white space character,fatal error,validation error,processor,non-validating processors,document values,valid values,ISO/IEC 10646,ISO/IEC 10646:2000,microarray data exchange specification,specification for inclusion,uniqueness constraint,additional naming constraints,content model restrictions,zero-trust security model,community-based, open source tool,external source,non-XML data,parse-able text data.