XML Syntax Rules Summary
XML documents have exactly one root
All elements have a parent element except for the
All elements have a start and an end tag (except
for empty elements), eg:
<myTag>some content in
Structured Data And XML Design Guidelines
1. XML shall be straightforwardly usable over the
2. XML shall support a wide variety of applications
3. XML shall be compatible with SGML
4. It shall be easy to write programs which process
Similar concept to scope rules for variables in
programming. For example, in Java, the key word
"this" is used as a prefix to refer to the instance
variable to avoid confusion with a local variable of
the same name. Another example: in Perl, th
XML Consists Of ELEMENTS
Each element is named and contains some
content (except for special empty elements).
Elements are represented using tags and each tag
has a corresponding closing tag unless it is
an empty tag, such as:
If an XML document includes code that requires
lots of entity (eg <) or character (eg <) references, it
may be simplified by enclosing the literal code (i.e <,
>, ", ', &)in a CDATA section.
The CDATA section is denoted by <!
[ CDATA [ .]>
XML Document As Tree
We may visualise the example from the previous
name custid creditlimit
custid creditlimit bal
The Web Services Interoperability
JAXB - Marshaling / Un-Marshaling Objects To And From XML
The Java Architecture for XML Binding (JAXB) provides an API that allows
two-way mapping between XML documents and Java objects.
Using a Document Type Definition (
XML Is Not Just A Markup Language
When we say "XML", we are really referring to a whole family of technologies:
DTD - HTML is defined by a Document Type
Definition (DTD) that specifies the structure and
syntax of all HTML valid documents.
In XML we can de
Introduction To CSE3WS Web Services
This lecture introduces the topics that will be covered in the unit Web
Services, and gives a definition of Web Services, its related technologies and
A Topic Diagram showing the relationships between the te
A Well-Formed XML document represents a data
object (or collection of data objects).
A well-formed XML document may also be Valid if
it meets further constraints imposed by a DTD or
Schema, see later.
Formally, an XML document consists of:
HTML (HyperText Markup Language) has been
the most successful markup language ever
developed. XML was created to address serious
shortcomings in HTML for certain applications.
HTML is display-centric: HTML markups are a
mixture of some lo