Write code Define a schema for credit card processing and (PIN-based) debit card processing (creditCardProcessing.xsd).

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Write code Define a schema for credit card processing and
(PIN-based) debit card
processing (creditCardProcessing.xsd). In order to process a credit
card a
requester/merchant will need to have a valid requester account with
the
clearinghouse. A merchant account is a commercial bank account
established
by contractual agreement between a merchant and the clearing house
and
enables a merchant that provides shopping facilities to accept
credit card
payments from its customers. A merchant account is required to
authorize
transactions. A typical response for a credit card is authorized,
declined, or
cancelled. When the clearinghouse processes accredit card sales it
returns a
transaction identifier (TransID) only when a Credit Card Sale is
authorized. If
the merchant needs to credit or void a transaction the TransID of
the original
credit card sale will be required. For simplicity assume that one
credit is allowed
per sale and that a credit amount cannot exceed the original sale
amount.