Gets an attribute value.

    Format

      SCA$GET_ATTRI_VALUE_T  handle, attribute_value

                             [,attribute_kind]

1  –  Arguments

 handle
    type:       $SCA_HANDLE
    access:     read/write
    mechanism:  by reference

    An SCA attribute handle describing either an attribute or an
    entity whose value is to be obtained.

 attribute_value
    type:       character string
    access:     read/write
    mechanism:  by descriptor

    The (string) value of the attribute being selected.

 attribute_kind
    type:       $SCA_ATTRIBUTE_KIND
    access:     read/write
    mechanism:  by reference

    Optional. The kind of attribute to be obtained.

2  –  Condition Values Returned

    SCA$_NORMAL           An attribute value has been successfully
                          returned.

    SCA$_NONE             Warning. An attibute-value has not been
                          returned. There are no such attributes in
                          the entity. This condition can be returned
                          only if this routine is processing an
                          entity.

3  –  Description

    The SCA$GET_ATTRI_VALUE_T routine returns the value of any
    attribute as a character string.

    If the handle describes an attribute, then this routine returns
    the value of that attribute. In this case, the attribute_kind
    parameter must not be specified.

    If the handle describes an entity, then this routine returns the
    value of the first attribute of that entity that is of the kind
    specified by the attribute_kind  parameter. In this case, the
    attribute_kind parameter must be specified.

    If you want to get more than one attribute value of a particular
    kind for an entity, you must use the routine SCA$GET_ATTRIBUTE.
    This applies only to the attribute kinds SCA$K_ATTRI_NAME and
    SCA$K_ATTRI_ALL.

    The value of any kind of attribute can be returned by this
    routine, except for SCA$K_ATTRI_ALL. This routine will convert to
    character string those attributes whose data type is not character
    string.

    This routine does not accept the attribute-kind SCA$K_ATTRI_ALL as
    the value of the attribute_kind parameter. It is not meaningful to
    get just the first attribute without regard to attribute-kind.