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OGC KML (Level 2) 2.2.0

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Blue Spatial

Blue Spatial Server 1.0
OGC KML (Level 2) 2.2.0 (Certified: 2017-10-09)
  Registered: 2017-09-26

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Chainbridge Technologies

RadResponder 1
OGC KML (Level 2) 2.2.0 (Certified: 2015-02-10)
  Registered: 2015-02-10

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Open Source Geospatial Foundation

GDAL/OGR 1.11
OGC KML (Level 2) 2.2.0 (Certified: 2014-08-15) | License | Source Code
  Registered: 2014-04-18
GDAL/OGR 2.1
OGC KML (Level 2) 2.2.0 (Certified: 2016-11-30)
Official OGC® Reference Implementation | License | Source Code
  Registered: 2016-08-22

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Rolta India, Ltd.

Rolta Basic Image Process 11
OGC KML (Level 2) 2.2.0 (Certified: 2015-10-13)
  Registered: 2015-09-10
Rolta Call Taker 9.5
OGC KML (Level 2) 2.2.0 (Certified: 2017-03-07)
  Registered: 2017-03-07
Rolta Command & Control - Critical Infrastructure 9.5
OGC KML (Level 2) 2.2.0 (Certified: 2017-03-30)
  Registered: 2017-03-08
Rolta Dispatcher 9.5
OGC KML (Level 2) 2.2.0 (Certified: 2017-03-07)
  Registered: 2017-03-07
Rolta GeoCAD Web 9.5
OGC KML (Level 2) 2.2.0 (Certified: 2017-03-07)
  Registered: 2017-03-06
Rolta Mission Orientation 5.2
OGC KML (Level 2) 2.2.0 (Certified: 2017-01-10)
  Registered: 2015-09-10
Rolta Security Operator Console 9.5
OGC KML (Level 2) 2.2.0 (Certified: 2017-03-30)
  Registered: 2017-03-08
Rolta Supervisor 9.5
OGC KML (Level 2) 2.2.0 (Certified: 2017-03-07)
  Registered: 2017-02-28