Clarify whether default colour spaces apply to inline images

[MPBailey]

Note 3 in "8.9.7 Inline images" says that various colour space names don’t refer to resources in the ColorSpace subdictionary; all well and good. But it starts by saying that they identify the corresponding colour spaces directly, which implies that DefaultGray, DefaultRGB and DefaultCMYK do not apply here.

If that's true then it shouldn't be in a note, but it would be odd to make inline images so different to everything else. I recommend clarifying that default colour spaces do apply here.

I suggest something like "The names DeviceGray, DeviceRGB, and DeviceCMYK (as well as their abbreviations G, RGB, and CMYK) never refer to resources in the ColorSpace subdictionary; they always identify the corresponding colour spaces either directly or via a default color space (see 8.6.5.6 Default colour spaces)."