Syntax

   FACTORY_DEF <ReaderKeyword> AttrSetFactory
   [FACTORY_NAME <factory name>]
   [MULTI_FEATURE_MODE <YES|NO>]
   [NUM_PRIOR_FEATURES <0 - MAX(9)>]
   [NUM_SUBSEQUENT_FEATURES <0 - MAX(9)>]
   [NULL_ATTR_MODE <NO_OP|EMPTY|CLOSEST|OTHER_NULL_VALUE>]
   [NULL_ATTR_VALUE <replacementValue>]
   [ATTRSET_PROPAGATE_MISSING <YES|NO>]
   [ATTRSET_CREATE_DIRECTIVES] <directives>]
   [MISSING_INPUT_ATTR_HANDLING <action> <REMOVE|PRESERVE|SET>]
   [ATTR <attrName> <attrValue>]
   [ATTR <attrName> <attrValue>]
   [ATTR <attrName> <attrValue>]
   [ACTION_COLUMN <actionColIndex>]
   [DEF_VAL_COLUMN <valueColIndex>]
   [NUM_OF_COLUMNS <numOfColumns>]
   [ATTR_ACTION <oldAttrName> <newAttrName> <attrValue> <attrType> <action>]
   or
   [ATTR_ACTION <oldAttrName> <newAttrName> <action> <attrValue> <attrType>]
   [... for each attribute to set....]
   [OUTPUT FEATURE_TYPE <feature type>

Overview

   This factory sets the specified attributes to a specified value

   MULTI_FEATURE_MODE: indicates if attrValue expressions will
   contain multi-feature references.  If so, then NUM_PRIOR_FEATURES
   and NUM_SUBSEQUENT_FEATURES indicate how many features this factory
   should 'hold in buffer' to allow expressions to be evaluated successfully.
   A smaller buffer will be faster and use less memory.  If multi feature
   mode is off, then the buffer is not used and each feature will be output
   from the factory as it is processed.

   NULL_ATTR_MODE: when in multifeature mode indicates how to evaluate
   an attribute reference (eg. @Value(feat[-1].a) ) in an expression when
   the attribute does not have a value (empty, null or missing).  If OTHER_NULL_VALUE
   is chosen, the NULL_ATTR_VALUE specifies the value to use. NO_OP indicates to use
   the value 'as is'

   ATTRSET_PROPOGATE_MISSING indicates whether or not to propogate
   missing attributes.  If set to 'yes', then if an expression evaluates to missing,
   the attribute being set will not be created.  if set to 'no', then the attribute
   is created with a value of NULL.

   ATTRSET_CREATE_DIRECTIVES: under the hood, this factory calls EvaluateExpression(ATTR_CREATE_EXPR_<directives>, ...)
   for each <attrValue>.  This parameter specifies the directive to add.  for
   example _DIV would cause EvaluateExpression(ATTR_CREATE_EXPR_DIV, ...) to be called.  Thus,
   using this directive controls the behavior of the underlying EvaluateExpression() calls.

   ATTR: gives an attribute name to set/create and an expression
   indicating the value for that attribute.

   ATTR_ACTION: gives an action to preform on an attribute.
   Valid actions are: SET_TO, REMOVE, RENAME_SET_DEFAULT,RENAME_SET_VALUE, COPY
   For SET_TO, the value of the new attribute is set to the <attrValue>
   For REMOVE, the <oldAttrName> is removed.
   For COPY, <oldAttrName> is copied to <newAttrName>.
   For RENAME_SET_DEFAULT, <oldAttrName> is renamed to <newAttrName>.
   For RENAME_SET_VALUE, <oldAttrName> is renamed to <newAttrName>, then set to
   <attrValue> if is not empty.

   MISSING_INPUT_ATTR_HANDLING: specifies what should happen when <oldAttrName> is missing
   and <attrValue> is empty for actions of type <action>. The possible options are:
      - PRESERVE: Preserves the existing <newAttrName>
      - REMOVE: Removes the existing <newAttrName>
      - SET: Sets <newAttrName> to <attrValue> (even if it is empty)