Please exmplain n-tier

Hi Willian Thompson,

        The EAL actually means "Entity Framework Access Layer". And the EAL mainly used to access the Database of the ADO.net. Also used to connect the database. And the EAL is enables the developer to access the data as domain specific object and properties. For Eg

 EntityType  ::= ENTITYTYPE nameOfEntity[BASE nameOfEntity
   [ABSTRACT true|false] KEY nameOfProperty[, nameOfProperty]*
     {(nameOfProperty PropertyType [PropertyFacet]*) +}
 PropertyType ::= ((PrimitiveType [PrimitiveTypeFacets]*)
   |  (NameOfType) | RowType
 PropertyFacet ::= ( [NULLABLE true | false] |
   [DEFAULT defaultVal] | [MULTIPLICITY [ 1|*] ] )
 PropertyTypeFacet ::= MAXLENGTH | PRECISION | SCALE | UNICODE | FIXEDLENGTH | COLLATION
   | DATETIMEKIND | PRESERVESECONDS
 PrimitiveType ::=  BINARY | STRING | BOOLEAN
   | SINGLE | DOUBLE | DECIMAL | GUID
   | BYTE | SBYTE | INT16 | INT32 | INT64
   | DATETIME | DATETIMEOFFSET | TIME )

Regards,
Selva Ganapathy K