Syntax FACTORY_DEF JoinFactory [FACTORY_NAME ] [INPUT FEATURE_TYPE [ ]* []*]* [READER_TYPE ] [READER_DATASET ] [READER_PARAMS []*] [TABLE_ID ] [MATCH_RULE (MUST_MATCH_ONE|MUST_MATCH_ZERO_OR_ONE|MATCH_FIRST|MATCH_ALL)] [COMBINE_ATTRIBUTES (PREFER_JOINED|PREFER_ORIGINAL|PREFIX_JOINED)] [JOINED_ATTRIBUTE_PREFIX ] [JOINED_LIST_NAME ] [PREFETCH_QUERY ] [CACHE_SIZE ] [JOIN_KEYS ""] [ADDED_FIELDS ""] [JOIN_ID ] [MATCHED_ATTRIBUTE ] [ONE_FEATURE_PER_JOIN [(YES|NO)]] [PREFETCH_EXHAUSTIVE [(YES|NO)]] [TRIM_KEY_FIELDS [(YES|NO)]] [REJECTION_ENABLED [(YES|NO)]] [UNJOINED_ENABLED [(YES|NO)]] [OUTPUT JOINED FEATURE_TYPE [ ]* []*]* Overview To be documented. Output Tags The JoinFactory supports the following output tag. JOINED To be documented. TO BE RESOLVED Overview and Output Tags sections need to be documented.