That parser provides vital information to the program on how to read the file. They can be free-standing software, libraries, modules and classes. This is true for development platforms as well, such as Java or Delphi. Software is smart, but computers by themselves are ignorant.Unless you are building your own software, there is no need to worry about finding an XML parser. When presented with a bunch of XML code, computer hardware has no clue what it means or what to do with it.When performance is the primary goal, a compromise must be reached between performance and conformance.
While the techniques were used for an parser, most of them can be applied to parsers of other formats or even unrelated software (e.g., memory management algorithms are widely applicable beyond parsers).
Without a parser, the XML code cannot be understood.
Because computers require instruction on how they should operate, an XML parser is inportant. When you open Firefox or Internet Explorer, or any other web browser, the program supplies the parser for you without you needing to do anything other than launch the browser software. It is the software that turns all the different languages into a workable format.
Since there are several substantially different approaches to syntax while validating parsers can check data semantics as well).
Even a non-validating parser has to do some relatively resource-intensive validation work.