Table of Contents
What is namespace for XML Schema?
As defined by the W3C Namespaces in XML Recommendation , an XML namespace is a collection of XML elements and attributes identified by an Internationalized Resource Identifier (IRI); this collection is often referred to as an XML “vocabulary.”
What is the use of namespaces in XML?
An XML namespace is a collection of names that can be used as element or attribute names in an XML document. The namespace qualifies element names uniquely on the Web in order to avoid conflicts between elements with the same name.
What is the correct way to declaring an XML namespace?
XML Namespaces – The xmlns Attribute When using prefixes in XML, a namespace for the prefix must be defined. The namespace can be defined by an xmlns attribute in the start tag of an element. The namespace declaration has the following syntax. xmlns:prefix=”URI”.
Which is the correct statement about XML namespace?
Answer: A namespace (or more precisely, a namespace binding) is declared using a family of reserved attributes. Such an attribute’s name must either be xmlns or begin xmlns:. The attribute’s normalized value must be either a URI reference — the namespace name identifying the namespace — or an empty string.
What is the most appropriate syntax for declaring namespace?
Which is the correct syntax of declaring a namespace? namespace B{ int i; };
Can XML have multiple namespaces?
When you use multiple namespaces in an XML document, you can define one namespace as the default namespace to create a cleaner looking document. The default namespace is declared in the root element and applies to all unqualified elements in the document. Default namespaces apply to elements only, not to attributes.
What is namespace explain with example?
A file path, which uses syntax defined by the operating system, is considered a namespace. For example, C:\Program Files\Internet Explorer is the namespace that describes where Internet Explorer files on a Windows computer.
Why do we need to use namespaces in our program?
A namespace can contain variables, functions, classes or other objects and even another namespace. Each member of the namespace can be referred to using a namespace space. This helps the compiler to differentiate between various programming entities even if they have the same names.
Why do we use using namespace std?
So when we run a program to print something, “using namespace std” says if you find something that is not declared in the current scope go and check std. using namespace std; are used. It is because computer needs to know the code for the cout, cin functionalities and it needs to know which namespace they are defined.
Are namespaces necessary?
Namespaces provide a method for preventing name conflicts in large projects. Symbols declared inside a namespace block are placed in a named scope that prevents them from being mistaken for identically-named symbols in other scopes. Multiple namespace blocks with the same name are allowed.
When should I use namespaces?
Namespaces are used to organize code into logical groups and to prevent name collisions that can occur especially when your code base includes multiple libraries.