attribute id naming

[Ramaiah, Vanna G.]

idp is releasing an attribute id="FirstName" in resolver.xml (below example). Can  a SP requesting givenName be able to use it or do a separate entry of givenName is required in resolver file?
<AttributeDefinition id="FirstName" xsi:type="Simple">
    <InputDataConnector ref="myAD" attributeNames="givenName" />
    <DisplayName xml:lang="en">First Name</DisplayName>
    <AttributeEncoder xsi:type="SAML1String" name="FirstName" encodeType="false" />
    <AttributeEncoder xsi:type="SAML2String" name="urn:oid:2.5.4.42" friendlyName="FirstName" encodeType="false" />
    </AttributeDefinition>


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