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|Oracle Java CAPS Master Index Standardization Engine Reference Java CAPS Documentation|
In a default Oracle Java CAPS Master Index implementation, the master index application uses the Master Index Match Engine and the Master Index Standardization Engine to cleanse data in real time. The standardization engine uses configurable pattern-matching logic to identify data and reformat it into a standardized form. The match engine uses a matching algorithm with a proven methodology to process and weight records in the master index database. By incorporating both standardization and matching capabilities, you can condition data prior to matching. You can also use these capabilities to review legacy data prior to loading it into the database. This review helps you determine data anomalies, invalid or default values, and missing fields.
In a master index application, both matching and standardization occur when two records are analyzed for the probability of a match. Before matching, certain fields are normalized, parsed, or converted into their phonetic values if necessary. The match fields are then analyzed and weighted according to the rules defined in a match configuration file. The weights for each field are combined to determine the overall matching weight for the two records. After these steps are complete, survivorship is determined by the master index application based on how the overall matching weight compares to the duplicate and match thresholds of the master index application.
In a master index application, the standardization and matching process includes the following steps:
The master index application receives an incoming record.
The Master Index Standardization Engine standardizes the fields specified for parsing, normalization, and phonetic encoding. These fields are defined in mefa.xml and the rules for standardization are defined in the standardization engine configuration files.
The master index application queries the database for a candidate selection pool (records that are possible matches) using the blocking query specified in master.xml. If the blocking query uses standardized or phonetic fields, the criteria values are obtained from the database.
For each possible match, the master index application creates a match string (based on the match columns in mefa.xml) and sends the string to the Master Index Match Engine.
The Master Index Match Engine checks the incoming record against each possible match, producing a matching weight for each. Matching is performed using the weighting rules defined in the match configuration file.