Introduction to XML in Oracle SOA

XML:

<? XML version =”1.0”?> <Employees> <Employee> <name>saiteja</name> <Id>2434</Id> </Employee> </Employees>    

Note1:

Id not there then instead of <Id>2430</Id> write <Id/>  

Note2:

1. XML pay load
2. XML data
3. XML document

  Note 3:

When write the XML document follow the below instructions

• Instead of

• < -  &lt;
• > - &gt;
• & - &amp;(ampersand)
• “ - &quot;(double quote)
• ‘ - &apos(Single quote)

  10,20 numbers:

<? XML version =”1.0”?> <Numbers > <Number > <Num1 >10</Num1 > <Num2>20</Num2> </Number > </Numbers >

 

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XSD:

<? XML version = “1.0”?> <Schema> <element name=”employees”> <Complex type> <Sequence> <element name= “employee”> <complex Type> <sequence> <Element name =”Name”  type =”string”/> <Element name =”Id”  type =”int”/> <Element name =”location”  type =”string”/> </sequence> </complex Type> </element> </sequence> </complex Type> </elements> </Schema>    

XSD:  It is used to define the data types of respective XML

Validation/ Enumerations/ restrictions in XSD:

<simple type name = “Name type”> <restriction type/ base= “string”> <enumeration value =”sai”/> <enumeration value =”Teja”/> <enumeration value =”XYZ” /> </restriction> </simple type>.

• customer, employee having/wants same data then we are write like this

  <? XML version = “1.0”?> <target Name space =”http://TCS.com/add2 numbers”> <Schema> <element name=”employees”  Type = “employee Type”/> <element name=”customer”  Type = “employee Type”/> <complex Type name=”employee Type/”> <Sequence> <element name=”Name”  Type = “string”/> <element name=”Eid”  Type = “int”/> </Sequence> </complex Type> </element> </schema>  

Definitions:

1. Name space: To avoid the collision (conflict) we will use the “name space” with identifies
2. Target name space: It is address of XML,XSD

                                           (or) It is address of any of artefacts -> XML, XSD, XSLT, XQuery, WSDL

3. Import: It is importing other XSD’s which are having “different T.N.S”.
4. Include: It is importing other XSD’s which are having “same T.N.S”.
5. XSD:

  <? XML version = “1.0”?> <target Name space =”http://TCS.com/item”> <Schema> <element name=”Item”  Type = “Item Type”/> <complex Type name=”Item Type/”> <Sequence> <element name=”item id”  Type = “int”/> <element name=”price”  Type = “int”/> </Sequence> </complex Type> </element> </schema>

Oracle SOA Interview Questions

• Import above XSD into My XSD:

 <? XML version = “1.0”?> <target Name space =http://oracle.com/customer> XMlns : item =” http://Tcs.com/item” - <types> <import name space =”http://TCS.com/item”> schema location  =”tem.XSD” </types>  

• Include above XSD(item.XSD) into my XSD:

<? XML version = “1.0”?> <target Name space =http://TCS.com/customer> XMlns : item =” http://Tcs.com/item” - <types> <nclude schema location = “item .XSD”> </types>  

X –path language:  

<? XML version = “1.0”?> <Customers> <Customer> <name> Ramesh </name> <id> 12345</id> <loc> hyd</loc> </Customer> <Customer> <name> Ramesh1 </name> <id> 121121</id> <loc> bngl</loc> </Customer> </Customers>

1. //* -> Entre XML document/pay load
2. /customers/customer[2] -> 2^nd record from XML document
3. / customer/customer[2]/loc -> <loc>Ind </loc>
4. / customer/customer[2]/loc /text() -> Ind
5. / customer/customer[d>450]/Name/text() -> ABC
6. / customer/customer[position()<= lost()-1]/id/test -> 49,50

49=50-1 Note: Total records 50

XSD: It is used to define the data types of respective XML.

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