# Package org.zkoss.zel.impl.lang

- Class Summary
  Class | Description
  --- | ---
  ELArithmetic | A helper class of Arithmetic defined by the EL Specification
  ELArithmetic.BigDecimalDelegate |
  ELArithmetic.BigIntegerDelegate |
  ELArithmetic.DoubleDelegate |
  ELArithmetic.LongDelegate |
  ELSupport | A helper class that implements the EL Specification
  EvaluationContext |
  ExpressionBuilder |
  FunctionMapperFactory |
  FunctionMapperImpl |
  FunctionMapperImpl.Function |
  VariableMapperFactory |
  VariableMapperImpl |