how can DTDs be used to define the structure of XML-based documents for representing social network data or relationships between entities

... Definition 1) [(Unification of Structures of XML Documents) (USD) tool]. from publication: Building an XML document warehouse | Data Warehouses and OLAP (On ... In the definition of XML [XML], this notion is defined as follows: An XML document type declaration contains or points to markup declarations that ... DTD stands for Document Type Definition. It defines the legal building blocks of an XML document. It is used to define document structure with a list of legal ... The supported document types include the following: - XML documents; - XSLT stylesheets; - XML Schema; - DTD (Document Type Definition) schemas; - RELAX NG full ... The rules for a given XML application are specified with a Document Type Definition (DTD). The DTD carefully lists the allowed element names and how ... The XML Document Type Declaration, commonly known as DTD, is a way to describe XML language precisely. DTDs check vocabulary and validity of the structure of ... XML external entities are a type of custom entity whose definition is located outside of the DTD where they are declared. The declaration of an external entity ... setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);. Disabling DTDs also makes the parser secure against denial of services (DOS) attacks ... Do not confuse Dreamweaver document type definition files with the XML document type definition (DTD). Document type definition files in Dreamweaver contain a ... These Guidelines define a large number of elements for marking up documents, all of which are formally defined within the document type declaration (DTD) files ...