1. Question:Write the differences between XML and HTML? 

    Answer
    1.XML is used to structure and describe data on the web, HTML will likely be used to format that data.
    2. XML take over the job of data storage, HTML would be used just for formatting and scripting.

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  2. Question:What are the benefits of using XML? 

    Answer
    i.  XML shall be straightforwardly usable over the internet.
      ii. XML shall support a wide variety of application	
     iii. XML documents shall be easy to create.

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  3. Question:Describe the parsed and unparsed entities. 

    Answer
    Ans:  Parsed Entities: A parsed entity conyain text data of the XML document once the data is processed.
    Unparsed Entities: An unparsed entity is a container whose content might or might not be text,if text ,the content is not parsable data.

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  4. Question:Explain the entity reference with example. 

    Answer
    Ans: The entity references acts as a placeholder for the content author, and the XML processor places the actual   content at each reference site.such as
    <TERM>Wild Ginger has the following &LR1;</TERM>

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  5. Question:What are internal entities and external entities? 

    Answer
    Internal Entities: An entity defined within its declaration and declared within the prolog. 
           External Entities: An entity that refers to an external storage unit, such as a binary file.

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  6. Question:Write the differences between valid document and well-formed document. 

    Answer
    valid document
    1.It strictly obeys all prolog outline rules .
    2. All the validity constraints identified in the XML specification
    
    well-formed document
    1. Some rules must be obeyed not all.
    2. obeyed rules are not nearly as strict as those constraints required for validity.

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  7. Question:What is DTD? 

    Answer
    DTD(Document type definition)acts as a rule book that allowes authors to create new document of the same type and with the same characteristics as a base document.

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  8. Question:What are the purposes of using IGNORE and INCLUDE keywords? 

    Answer
    The IGNORE and INCLUDE keywords using by authors to turn portions of the DTD “on” or “off”.

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  9. Question:What is the purpose of using XLink? 

    Answer
    XLink usesXml to define all the pieces necessary to build links into XML documents.

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  10. Question:What is the purpose of using XSL? 

    Answer
    XSL (Extensible Stylesheet Language) is used to create extensible style sheets based on formatting rules.

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