Extended Log Format is a standardised text file format, like Common Log Format

Common Log Format

The Common Log Format is a standardised text file format used by web servers when generating log files. Because the format is standardised, the files may be analysed by a variety of analysis programs....

(CLF), that is used by web servers when generating log files, but ELF files provide more information and flexibility.

Example

#Version: 1.0
#Date: 12-Jan-1996 00:00:00
#Fields: time cs-method cs-uri
00:34:23 GET /foo/bar.html
12:21:16 GET /foo/bar.html
12:45:52 GET /foo/bar.html
12:57:34 GET /foo/bar.html

Sources

• Extended Log File Format as described in the documentation of the World Wide Web consortia webserver (W3C httpd).