IT8 target colour space

Good evening,

just found out that the colours contained in the LSI Kodachrome IT8-target only cover the sRGB space in the CIE diagram. I use Argyll to create the scanner’s ICC-profile from this.

What happens, if I render a scanned image into AdobeRGB space with such an ICC-profile? Are colours outside the sRGB range extrapolated from the profile?

Hermann-Josef