Validating parser software sax
The following callback methods are provided in both of them (note, although callback methods are typically used in SAX parser as I mentioned before, Xerece J's DOMParser actually also provides most of these callback methods) Yes, of course, because the use of a DOM parser and a SAX parser is independent.
For example, if your application needs to work on two XML documents, and does different things on each document, you could use a DOM parser on one document and a SAX parser on another, and then combine the results or make the processings cooperate with each other.
He could immediately assign a grade to a student once the SAX parser reads the grade of this student.
What's more, it runs faster and is easier to learn than DOMParser because its API is really simple.
What he needs to do is to first modify the DOM tree (i.e., set value to the 'grade' node) and then save the whole modified tree.
If he choose to use a SAX parser instead of a DOM parser, then in this case he has to create a data structure which is almost as complicated as a DOM tree before he could get the job done. But I am sure that both Xereces J's SAXParser and DOMParser fully support namespace.
To highlight that the DTD has been used for the validation, the title attribute in the input document has a value which is not allowed according to this DTD.
When using this DTD to validate the input XML document, the following error gets reported: Before a document can be called XML and not csv, simple text or any other format, it needs to support the basic rules as defined by the XML Recommendation, when it adheres to these rules it is said to be Wellformed XML.