XML DTD Editor & Validator
A DTD is the oldest and simplest form of XML schema. EditiX always performs a syntactic check, and will additionally run a full DTD validation once a DTD is associated with the document.
<!ELEMENT myDoc (chapter)>
<!ELEMENT chapter (title, p+)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT p (#PCDATA)>
<!ATTLIST chapter id ID #REQUIRED>