The XML specification supports a very specific character set. Characters that fall outside of the specified ranges result in a parser error whenever the XML string is parsed.
The XML specification allows for the use of various encodings. UTF-8 or UTF-16 are typically expected; however, it is recognised that other encodings exist in the world: Correctly encoding XML allows for portable applications.
A newly created, in-memory, XML document is sometimes necessary for ad-hoc data manipulation and / or document generation.
There are a number of methods to read an XML attribute value. We present two common methods here: Locate and read an element value using the XML DOM; or Locate and read an element using XPATH expressions.
Integration between disparate systems sometimes require a mapping exercise between the protocol XML and the POJO you are using for data storage processing. Java defines a comprehensive binding framework – JAXB – which can be used for this task.
The example executes an XSL transform on a source XML document which generates a new result.
XML is a simple text format by design, however, XPATH defines multiple data types which allow for more robust calculation and comparison operations in XSLT and programming languages.
There are a number of methods to read an XML element value. We present two common methods here: Locate and read an element value using the XML DOM; or Locate and read an element using XPATH expressions.
Reading / Opening an XML document is an essential skill for XML processing. The method of reading an XML document depends on the technical requirements (document source, code purpose, etc.) and constraints (processing speed, memory footprint, etc.).