What is the main difference between XML and HTML?
1. Xml is case sensitive
2. In xml, there is no predefined tags such as
3. Each element must be closed.
4. Each attribute must be in enclosed by "".
5. Xml is for data, html is for visualization.
HTML is basically for the presentation of the dataIt Uses predefined tags for the presentation of the data.
XML is for describing the dataUser defined tags are used to describe the data structure and data.
XML
User definable tags
Content driven
End tags required for well formed documents
Quotes required around attributes values
Slash required in empty tags
HTML
Defined set of tags designed for web display
Format driven
End tags not required
Quotes not required
Slash not required
What parser would you use for searching a huge XML...
SAX, event based XML parser is probably what is needed to search huge file.
DOM store the whole content on memory which is in huge file is not good since it uses a lot of memory.
SAX is event based that handle XML elements when it find it.
What is a CDATA section in XML?
If we want to exclude some elements in XML document from parsing then we need to put those elements in CDATA.
So can we call Cdata as used for commenting in XML ?
CDATA in XML is the character data is is not parsed by the XML Processor.
If there is a section in the document that you do not want the XML processor to parse, then it can be enclosed in
What is DTD?
A Document Type Definition (DTD) defines the legal building blocks of an XML document.
It defines the document structure with a list of legal elements and attributes. DTD is Document Type Definition which gives the legal building blocks of an XML document.
The document which has a DTD associated with it is a Valid XML Document.
Dtd is document type definition used to building block and it is the set of the rule and document information.
Why is XML extensible?
The very purpose of XML is extension of the document.
XML specifies few and simple rules like
. The document should be a well formed xml.
. Must have a root element
. An element must have end tag
. Few other simple rules
Other than that, XML doesn’t levy heavy restriction like
. The document must contain 'n' tags, starting with xyz tag. (As html does, first tag should be html,header,body etc)
. No restriction on formatting of data (color, font etc.)
Thus xml is easily extensible and the proof is WML,mathXML,ebML,and cXML
What is the use of xml.onload property?
The "
What are the major features of XML?
• Properly nested
• Case sensitive
• Text based Compatible with the existing standards, Html,...
Where data is stored in XML?
Hi,XML data is stored as column data.
Data is stored in a data base (Depends on the machine it's running).
A main table is created in a relational database management system, wherein the main table has a column for storing as document in a native XML format One or more side tables are created in the relational database management system, wherein each side table has one or more columns that store one or more attributes extracted from the XML document for fast searching of the XML document.
Thereafter, the side tables are used to locate data in the main table.
How do you say XML is secured language on the information exchange over the network?
Actually it isn’t.
XML may be easy to write and even parse, but the use of XML as a medium of B2B data interchange is still bleak.
XML is used mainly for Application integration as it is just within the organization and where major security issues will not rise.
Also, with the ESB revolution and the whole industry striding towards SOA, XML is able to make its own impact.
But still, for B2B integrations, organizations prefer to use EDI ( electronic Data Interchange ) as compared to XML because EDI has withstood the test of time on security and also has tailor made templates for each industry.
XML is still in the amateur stage;
it’s still evolving. It will take a long time before we get to see XML taking up the place of EDI.
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