What is DTD and XML Schema?
XML schemas are written in XML while DTD are derived from SGML syntax. XML schemas define datatypes for elements and attributes while DTD doesn't support datatypes. XML schemas allow support for namespaces while DTD does not. XML schemas define number and order of child elements, while DTD does not.
How is the XML Schema similar with DTD?
Document Type Definition and XML Schema Definition both contain a set of rules that control the structure and elements of XML files, but they are different in syntax and usage. They check whether an XML document has a valid structure or not.
How to generate DTD from XML?
Generate a DTD for an XML file
- Open the file in the editor.
- In the main menu, go to Tools | XML Actions | Generate DTD From XML File. IntelliJ IDEA inserts the resulting DTD as a section above the first line of the file.
Why is XML better than DTD?
XML Schema supports data types and namespaces, which DTD does not. This means that with XML Schema, you can specify the data type of an element (like string, integer, date, etc.), and you can also use namespaces to avoid naming conflicts in your XML documents.
Because DTDs are one of the earliest schema languages for XML, defined before XML even had namespace support, they are widely supported.
Для визначення схем XML були розроблені спеціальні мови. Мова Document Type Definition (DTD), яка використовується в специфікації XML, є досить обмеженою мовою …
XML Schema的作用是定义一份XML文档的合法组件群，就像文档类型定义（外语缩写：DTD）的作用一样,一份XML Schema定义了可以出现在文档里的元素和属性的相关 …