Naming conventions and file extensions

The following naming conventions and file extensions are in use by DITA.

DITA topic instance files: *.dita (recommended), *.xml
DITA map instance files: *.ditamap
DTD structural module files: typename.mod
DTD domain module files: typenameDomain.mod; typenameDomain.ent
Schema structural module files: typenameMod.xsd; typenameGrp.xsd
Schema domain module files: typenameDomain.xsd
CSS override files (recommended convention for tool providers): typename.css; customization-purpose.css
XSLT override files (recommended convention for tool providers): typename.xsl; customization-purpose.xsl
Conditional processing profiles: profilename.ditaval