Xml Parsers
different types of XML parsers: SAX, DOM, and JAXB
SAX parser is an event driven low-level parser, that responds to the elements of an XML document as it parses through the documents. The data is not maintained in memory. Efficiency of parsing data into elements is the key feature of SAX parser. DOM parser is a high-level parser that maintains the data structures of a document in memory as it parses through the document. This helps you to manage and manipulate data as needed. DOM API follows the tree model for maintaining the data in memory.
Formerly known as Project Adelard, Java Architecture for XML binding (JAXB) combines the benefits of Document Object Model (DOM) parser and Simple API for XML (SAX) parser. JAXB reduces the execution time significantly and creates a robust object model for enterprise level applications.
A "flat file" is a plain text or mixed text and binary file which usually contains one record per line[2] or 'physical' record (example on disc or tape). Within such a record, the single fields can be separated by delimiters, e.g. commas, or have a fixed length. In the latter case, padding may be needed to achieve this length. Extra formatting may be needed to avoid delimiter collision. There are no structural relationships between the records.
is now a popular format for storing data in plain text files, but as XML allows very complex nested data structures to be represented and contains the definition of the data, it would be incorrect to describe this type of database as conforming to the flat-file model.
Although the original purpose of XML was as a way to mark up content, it became clear that XML also provided a way to describe structured data thus making it important as a data storage and interchange format. XML provides many advantages as a data format over others, including:
1. Built in support for internationalization due to the fact that it utilizes unicode.
2. Platform independence (for instance, no need to...
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