XML Flashcards
DTD vs XSD
DTD is well formed(syntax)
XSD is well-formed and valid
HTML vs XML
HTML is developed to display data while XML describe data
DOM vs SAX parser
Dom is tree based parser, can read and write.
SAX parse step by step, can read
DTD stands for
Document Type Definition
What is DTD?
A Document Type Definition (DTD) defines the legal building blocks of an XML document. It defines the document structure with a list of legal elements and attributes.
What is XSD?
XSD (XML Schema Definition) is a World Wide Web Consortium (W3C) recommendation that specifies how to formally describe the elements in an Extensible Markup Language (XML) document. This description can be used to verify that each item of content in a document adheres to the description of the element in which the content is to be placed.
XML stands for
Xtensible Markup Language
What is XML for?
Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
What is JAXP
JAXP (Java API for XML Processing) is a rather outdated umbrella term covering the various low-level XML APIs in JavaSE, such as DOM, SAX and StAX. JAXP is Java API for XML Processing, which provides a platform for us to Parse the XML Files with the DOM Or SAX Parsers.
What is JAXB
JAXB (Java Architecture for XML Binding) is a specific API (the stuff under javax.xml.bind) that uses annotations to bind XML documents to a java object model. Where as JAXB is Java Architecture for XML Binding, it will make it easier to access XML documents from applications written in the Java programming language.
How do you use JAXP
Computer.xml File, if we want to access the data with JAXP, we will be performing the following steps
Create a SAX Parser or DOM Parser and then PArse the data, if we use DOM, it may be memory intensive if the document is too big. Suppose if we use SAX parser, we need to identify the beginning of the document. When it encounters something significant (in SAX terms, an “event”) such as the start of an XML tag, or the text inside of a tag, it makes that data available to the calling application.
Then Create a content handler that defines the methods to be notified by the parser when it encounters an event. These methods, known as callback methods, take the appropriate action on the data they receive.
How do you use JAXB
Bind the schema for the XML document.
Unmarshal the document into Java content objects. The Java content objects represent the content and organization of the XML document, and are directly available to your program. After unmarshalling, your program can access and display the data in the XML document simply by accessing the data in the Java content objects and then displaying it. There is no need to create and use a parser and no need to write a content handler with callback methods. What this means is that developers can access and process XML data without having to know XML or XML processing
What is JAX-P for DOM?
Document object Model Tree based parser Can read and write operation Loads entire XML into memory Good for deeply nested documents
What is JAX-P for SAX?
Simple API for XML Read only Much faster for smaller documents Faster for querying Scan from top to bottom
