> ## Documentation Index > Fetch the complete documentation index at: https://labs.laer.ai/llms.txt > Use this file to discover all available pages before exploring further. # Lucene Epiq AI supports Lucene syntax for keyword search. Below is a list of query examples:

Query	Search string	Description
Single word	foo
Phrase	"foo bar"
AND, OR, NOT	foo AND bar, foo OR bar, foo NOT bar	The "NOT" operator excludes documents that contain the term after NOT. It cannot be used with just one term, for example, NOT foo will not work.
Wildcard search	foo\, foo\bar, foo?, foo?bar	"?" is used for single character wildcard search; "\" is used for multiple character wildcard search. "\" and "?" cannot be used as the first character of a search.
Fuzzy search	foo\~, foo\~0.8	Use "\~" at the end of a single word term to search for a similar term based on string similarity. You can specify the similarity value between 0 and 1 with a higher value indicating higher similarity.
Proximity search	"foo bar"\~10	Use "\~" at the end of a phrase like "foo bar"\~10 to search for a "foo" and "bar" within 10 words of each other in a document. Note that the proximity search in Lucene is ordered, i.e., the terms will be matched in exact order.
Regular expression	/\d+/	Wrap regex inside `/` and `/`

## **Regular expression** A common list of regular expressions | Query | Regular Expression | Match results | | ---------------------- | -------------------------------------------- | ------------------------------------------- | | Social security number | /\d\{3}-\d\{2}-\d\{4}/ | 010-00-1234 | | Dates | /\[0-9]\{2}/\[0-9]\{2}/\[0-9]\{2,4}/ | 09/27/2000 | | Phone numbers | /(\[0-9]\{3}-)?\[0-9]\{3}-\[0-9]\{4}/ | 301-280-6231 | | Email addresses | /(\[\w\_.]+)\\@(\[\w\_.]+).(\[\w\_.]\{2,6})/ | [abc.123@test.com](mailto:abc.123@test.com) |