Regular expressions

Most POSIX Extended Regular Expressions are supported. For tutorial and examples of regular expressions, see https://regexr.com/.

Our preconfigured preprocessing rules contain regular expressions.

The examples of regular expressions provided in our production database:

1. The preprocessing rule Replies in Mozilla Thunderbird messages.

   The rule detects the following text block:

   On 9/6/2017 12:55 PM, Danielle Fischer wrote:

   Regular expression (?is)On [0-9/]+.*wrote: can be interpreted as follows:

   (?is)	Do case-insensitive pattern matching (using installed in you system locale settings). Treat string as single line.
   On [0-9/]+.*wrote:	Match strings that contain the following parts: the word On and any symbol from the list: digits from 0 to 9, or /; repeated one or more times the word wrote: zero or more symbols between the above parts

2. The preprocessing rule Replies in Microsoft Outlook messages.

   The rule detects the following text block:

   	From: Danielle Fischer
   	Sent: Friday, 26 May, 2017 23:41
   	To: Lynch Stevens [mailto:lstevens@example.com]
   	Subject: Strip replies from email
   

   Regular expression From:.*Subject:.+?\r\n can be interpreted as follows:

   From:.*Subject:.	Match strings that contain words From: and Subject with zero or more symbols between these words.
   +?	one or more times
   \r	predefined by car return
   \n	predefined by new line