DebugType

for events that generated an error

for behaviour that has been marked for deprecation

for behaviour that is undefined according to the specification

for implementation-dependent performance warnings

for the use of extensions or shaders in a way that is highly vendor-specific

for annotation of the command stream

for entering a debug group with glPushDebugGroup

for leaving a debug group with glPopDebugGroup

for events that don't fit any of the ones listed above