文書タイプ定義 (DTD) の形式の文書モデルの構文を正式に記述したものを次に示します。
<!ELEMENT GPPModel (GPPFieldDefinition|GPPAttributeDefinition)+> <!ELEMENT HTMLModel (HTMLFieldDefinition|HTMLAttributeDefinition)+> <!ELEMENT XMLModel (XMLFieldDefinition|XMLAttributeDefinition)+> <!ELEMENT GPPFieldDefinition EMPTY> <!ATTLIST GPPFieldDefinition name CDATA #REQUIRED> <!ATTLIST GPPFieldDefinition start CDATA #REQUIRED> <!ATTLIST GPPFieldDefinition end CDATA #IMPLIED> <!ATTLIST GPPFieldDefinition exclude (YES|NO) NO> <!ELEMENT GPPAttributeDefinition EMPTY> <!ATTLIST GPPAttributeDefinition name CDATA #REQUIRED> <!ATTLIST GPPAttributeDefinition start CDATA #REQUIRED> <!ATTLIST GPPAttributeDefinition end CDATA #REQUIRED> <!ATTLIST GPPAttributeDefinition type NUMBER #REQUIRED> <!ELEMENT HTMLFieldDefinition EMPTY> <!ATTLIST HTMLFieldDefinition name CDATA #REQUIRED> <!ATTLIST HTMLFieldDefinition tag CDATA #REQUIRED> <!ATTLIST HTMLFieldDefinition meta-qualifier CDATA #IMPLIED> <!ATTLIST HTMLFieldDefinition exclude (YES|NO) NO> <!ELEMENT HTMLAttributeDefinition EMPTY> <!ATTLIST HTMLAttributeDefinition name CDATA #REQUIRED> <!ATTLIST HTMLAttributeDefinition tag CDATA #REQUIRED> <!ATTLIST HTMLAttributeDefinition meta-qualifier CDATA #IMPLIED> <!ATTLIST HTMLAttributeDefinition type NUMBER #REQUIRED> <!ELEMENT XMLFieldDefinition EMPTY> <!ATTLIST XMLFieldDefinition name CDATA #REQUIRED> <!ATTLIST XMLFieldDefinition locator CDATA #REQUIRED> <!ATTLIST XMLFieldDefinition ignore (YES|NO) NO> <!ATTLIST XMLFieldDefinition priority CDATA #IMPLIED> <!ATTLIST XMLFieldDefinition exclude (YES|NO) NO> <!ELEMENT XMLAttributeDefinition EMPTY> <!ATTLIST XMLAttributeDefinition name CDATA #REQUIRED> <!ATTLIST XMLAttributeDefinition locator CDATA #REQUIRED> <!ATTLIST XMLAttributeDefinition ignore (YES|NO) NO> <!ATTLIST XMLAttributeDefinition priority CDATA #IMPLIED> <!ATTLIST XMLAttributeDefinition type NUMBER #REQUIRED>