.SDM File Extension
File Type 1StarOffice Mail Message
What is an SDM file?
E-mail message created with the StarOffice Mail e-mail client; included with earlier versions of StarOffice; not supported by OpenOffice.org software.
File Type 2Spatial Data Modeling Language File
.SDM File Association 2
NOTE: "SDM" is also a common abbreviation for "Spatial Data Model," which refers to the structure used to store mapping data.