ersV2sym*
ERS True Type font file names ending with a "_sym.ttf" suffix are "symbol" encoded for use with older applications that do not display "text" encoded fonts. These files are stored in the directory labeled: "ersV2sym"
ersV2txt*
Most current applications work with "text" encoded fonts. The ERS True Type font file names ending with a "_txt.ttf" suffix are recommended for use in current applications. These files are stored in the directory labeled: "ersV2txt"
If you would like to be notified of future updates and the progress of the standard, you can join this list-serve: http://lists.floodmaps.net/cgi-bin/lyris.pl?join=hswg-symbology
Check http://www.fgdc.gov/HSWG for information regarding the Emergency Response Symbology.
All of the True Type Fonts provided in the Emergency Response Symbology Version 2.20 download have been validated with the Microsoft Font Validator. More information on the Microsoft Font Validator at: http://www.microsoft.com/typography/developers/validator/