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# Assess

This option enables you to assess the performance and accuracy of an Eduction grammar against a set of pre-tagged examples.

You must supply a text file with one phrase on each line; the `Assess` feature checks whether each line contains a match.

You must specify at least one input file, using the `-v` parameter or the `-w` parameter. If required, you can specify both of these parameters.

You can use wildcard expressions in the `-e` and `-g` parameters; see Wildcard Expressions in edktool for more information.

`-l <licensefile>` | The file containing a valid license key for Eduction. If you do not specify a license key at the command line, `edktool` assumes that the location of the license file is `licensekey.dat`. If the license is kept in this location, you do not need to specify this parameter.
`-c <configfile>` | A configuration file controlling the assessment. The configuration file can be either an IDOL Server style .CFG configuration file or an XML configuration file. See Configuration Files for Eduction Settings. You can specify one or more grammar files and one or more entities in place of a configuration file. Specifying a configuration file overrides the grammar or entity parameters.
`-g <grammarfile>` | A grammar file to use when `-c` is not used. If you provide a grammar file but you do not specify any entities with `-e`, Eduction extracts all entities in the grammar file.
`-e <entity>` | The entities to extract when `-c` is not used. Separate multiple entities with a comma.
`-x` | (Optional) Modifies the behavior so that the `Assess` feature checks for exact matches.
`-m <matched entities>` | (Optional) This parameter does not change the extraction behavior, but enables you to check which entities are producing the matches.
`-v <valid_input>` | A file of phrases where a match would be valid.
`-w <invalid_input>` | A file of phrases where a match would be invalid.
`-a` | (Optional) The output includes explanations of each failure, and statistics such as recall, precision, and F1 (depending on the type of input file you provided). Include the `-a` parameter to display additional output, including the results for every phrase in your input files.
`-o <outputfile>` | (Optional) By default, Eduction sends output to the console. To send the output to a file, use the `-o` parameter. The output is a list of all phrases that failed. For valid input this would be a phrase that contained no match; for invalid input this would be a phrase that contained a match.
`-q` | (Optional) Sets “Quiet Mode” so that descriptive messages are removed, and the output consists only of a list of examples that failed, in the form `"FAIL: "text" is matched by "entity""` or similar, depending on the test specifications. If you also set the `-a` parameter, examples that pass are also included in the output.

For more information on how to use the Assess feature to check the effectiveness and performance of your grammar files, refer to IDOL Expert.

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