1. What is a markup
language?
Markup languages
are designed for presentation of text in different formats, and it can also be
used for transporting and storing data. This markup language specifies the code
for formatting, layout and style of data .This markup code is called Tag.
HTML and XML are
examples of Markup Language.
2. What is XML?
XML is called
Extensible Markup Language which is designed to carry or transport and store
data. XML tags are not as predefined as HTML, but we can define our own user
tags for simplicity. It mainly concentrates on storing of data, not on
displaying of data.
3. What are the
features of XML?
Main features of
XML are:
• Very easy to
learn and implement
• XML files are
text files, and no editor is required
• Minimal and a limited
number of syntax rules in XML
• It is extensible,
and it specifies that structural rules of tags
4. What are the
differences between HTML and XML?
Following are the
differences between HTML and XML:
HTML
|
XML
|
Markup language used to display data
|
Markup language used to store data
|
Case Insensitive
|
Case sensitive
|
Designing web pages
|
Used to transport and store data
|
Predefined Tags
|
Custom Tags
|
Does not Preserve white spaces
|
Preserve white spaces
|
Static
|
Dynamic
|
5. Which tag is used to find the version of
XML and the syntax?
Declaring the XML version is very important for each XML
document and platform needs to be specified in which it is running.
<?xml version=”1.1” encoding=”|ISO-8859-1|”?>
6. What is XML DOM Document?
XML Document object represents the whole XML document, and
it is the root of a document tree. It gives access to entire XML document –
Nodes and Elements, and it has its own properties.
7. What is XPath?
XPath is used to find information in an XML document and
contains standard functions. XPath is the major element in XSLT, and it is w3c
recommendation.
8. What is an attribute?
An attribute provides more or additional information about
an element than otherwise.
Example –
<Person name=”Peter”>
Attribute name can be given to an element
person
9. Can we have empty XML tags?
Yes, we can have empty tags in XML. Empty tags are used to
indicate elements that have no textual content. Empty tags can be represented
as
<person></person>
<person/>
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