Attribute merging strategy that sums both attribute values when merging attributes. When merging two attributes,
attribute values that are not NumericAttrValues nor can't be directly converted to one are considered to be
NumericAttrValues with value 0.
StringAttrValues whose value can be parsed to a double can be converted to a NumericAttrValue.
BooleanAttrValues with value false can be converted to a NumericAttrValue with value 0.
BooleanAttrValues with value true can be converted to a NumericAttrValue with value 1.
Attribute merging strategy that sums both attribute values when merging attributes. When merging two attributes, attribute values that are not NumericAttrValues nor can't be directly converted to one are considered to be NumericAttrValues with value 0.
StringAttrValues whose value can be parsed to a double can be converted to a NumericAttrValue. BooleanAttrValues with value
false
can be converted to a NumericAttrValue with value 0. BooleanAttrValues with valuetrue
can be converted to a NumericAttrValue with value 1.