5.10 SFTime and MFTime
The SFTime field or event specifies a single time value. The MFTime
field or event specifies zero or more time values. Time values are
written to the VRML file as a double-precision floating point
number in ISO C floating point format (see 2.[ISOC]). Time values are
specified as the number of seconds from a specific time
origin. Typically, SFTime fields and events represent the number of
seconds since Jan 1, 1970, 00:00:00 GMT. For example:
fooTime 0.0
is an SFTime field, fooTime, representing a time of 0.0 seconds.
The initial value of an SFTime eventOut is -1. The initial value of an
MFTime eventOut is [ ].