Use features to improve your LUIS app's performance
You can add features to your LUIS app to improve its accuracy. Features help LUIS by providing hints that certain words and phrases are part of a category. If LUIS learns how to recognize one member of the category, it can treat the others similarly.
Add phrase list
Open your app by clicking its name on My Apps page, and then click Build, then click Phrase lists in your app's left panel.
On the Phrase lists page, click Create new phrase list.
In the Add Phrase List dialog box, type "Cities" as the name of the phrase list. In the Value box, type the values of the phrase list. You can type one value at a time, or a set of values separated by commas, and then press Enter.
LUIS can propose related values to add to your phrase list. Click Recommend to get a group of proposed values that are semantically related to the added value(s). You can click any of the proposed values, or click Add All to add them all.
Click These values are interchangeable if the added phrase list values are alternatives that can be used interchangeably.
Click Save. The "Cities" phrase list is added to the Phrase lists page.
Edit phrase list
Click the name of the phrase list on the Phrase lists page. In the Edit Phrase List dialog box that opens, make any required editing changes and then click Save.
Delete phrase list
Click the ellipsis (...) button at the end of the row, and select Delete.
Deactivate phrase list
Click the ellipsis (...) button at the end of the row, and select Deactivate.
Pattern (regular expression) feature
This feature is deprecated. New pattern features cannot be added to LUIS. Any existing pattern features are supported until May 2018. Contribute to standard LUIS regular expression matching with a PR to the Recognizers-Text Github repository.
After adding, editing, deleting, or deactivating a phrase list, train and test the app again to see if performance improves.