X10a-va-q Explain the concept of validity Explain or identify the difference between "well-formed" and "valid" Explain the difference between "well-formed" and "valid". In order to be valid, an XML document must conform to the rules of one (or more) specific XML language's official, public definition, as well as being well-formed. In order to be "valid" an XML document must: (mark all) be "well-formed" according to the rules of XML conform to Backus-Naur form (BNF) conform to Augmented Backus-Naur form (ABNF) conform to the DTD or schema of the specific XML language of which it is an example make at least one reference to coffee grounds To be "valid", an XML document must be "well-formed" according to the rules of XML, and conform to the DTD or schema of the specific XML language of which it is an example. To be "valid", an XML document must be "well-formed" according to the rules of XML, and also conform to the DTD or schema of the specific XML language of which it is an example. True False True In XML, being "valid" means conforming to general XML rules, and being "well formed" means conforming to a DTD or schema for a specific type of XML. True False False: that's backwards. Actually, being "valid" means conforming to a DTD or schema for a specific type of XML, and being "well formed" means conforming to general XML rules. Explain or identify the purpose of DTDs and Schemas Briefly explain the purpose of DTDs and Schemas. These are the documents that provide a formal, on-line, machine-readable definition of a particular XML-based language. Identify the purpose of DTDs and Schemas: to provide metadata for a data set to provide on-line processing of XML data to provide a formal, on-line, machine-readable definition of a particular XML-based language to provide a customized data-entry format for a specific XML-based language to force programmers to stay at work until 4 AM The purpose of DTDs and Schemas is to provide a formal, on-line, machine-readable definition of a particular XML-based language. The purpose of DTDs and Schemas is to provide a formal, on-line, machine-readable definition of a particular XML-based language. True False True The purpose of DTDs and Schemas is to provide metadata for a data set. True False False: The purpose of DTDs and Schemas is to provide a formal, on-line, machine-readable definition of a particular XML-based language. Differentiate DTDs from Schemas Briefly list some differences between DTDs and schemas. Schemas are written using XML itself; most new standards are defined using schemas. DTDs were the only way to define XML languages at first, and were also used in XML's predecessor, SGML. Identify all aspects of XML schemas that are NOT true of DTDs provide machine-readable on-line definition of an XML-based language written using XML used to define the earliest XML-based languages used to provide finer control over data formats used to define SGML documents as well as XML Schemas are written using XML, and provide finer control over data formats. (Note that schemas do provide machine-readable on-line definition of an XML-based language, but that is also true of DTDs, and so is excluded by the conditions of the question.) Schemas are written using XML, and provide finer control over data formats. True False True Schemas, not DTDs, were used to define the earliest XML-based languages. True False False: schemas are relatively recent; DTDs were used to define the earliest XML-based language. Identify the most authoritative XML validator. Which is the most authoritative XML validator? The World Wide Web Consortium (W3C, http://validator.w3.org/) Which provides the most authoritative XML validator? OASIS: Organization for the Advancement of Structured Information Standards IEEE: Institute of Electrical and Electronics Engineers W3C: World Wide Web Consortium MIT: Massachusetts Institute of Technology IAB: Internet Architecture Board W3C: World Wide Web Consortium W3C, the World Wide Web Consortium, provides the most authoritative XML validator. True False True IEEE, the Institute of Electrical and Electronics Engineers, provides the most authoritative XML validator. True False False: W3C, the World Wide Web Consortium, provides the most authoritative XML validator. Explain or identify why validity is important Briefly explain why validity is important. XML's strength lies in being both open and standard, but invalid documents are weak, because they deceive others into thinking they're open and standard, often leading to errors in processing. Identify reasons why it's important to create XML documents that are valid: valid documents are easier to create than invalid ones valid documents are less bulky than invalid ones valid documents are less likely than invalid ones to lead to processing errors valid documents conform to an open source of rules valid documents enable the brewing of more flavorful coffee Valid documents are less likely than invalid ones to lead to processing errors, and they conform to an open source of rules. Valid documents are less likely than invalid ones to lead to processing errors, and they conform to an open source of rules. True False True Valid documents are better than invalid ones because they are less bulky. True False False: Valid documents are better than invalid ones because they are less likely to lead to processing errors, and they conform to an open source of rules.