environment_map not declared by material/pbr/specular in material.sdf

[FirefoxMetzger]

The test sdf material_pbr.sdf uses an element called environment_map inside of the specular element of a pbr material:

https://github.com/ignitionrobotics/sdformat/blob/e4c658f14b73ab839d730c7a402a82a7dfa6a16e/test/sdf/material_pbr.sdf#L36

However, I can not find the matching tag on the website, and it is also missing from the material.sdf.

Website for 1.8: http://sdformat.org/spec?ver=1.8&elem=material#pbr_specular
Website for 1.6 (test uses this version): http://sdformat.org/spec?ver=1.6&elem=material#pbr_specular
Source Code: https://github.com/ignitionrobotics/sdformat/blob/e4c658f14b73ab839d730c7a402a82a7dfa6a16e/sdf/1.8/material.sdf#L112-L153

@jennuine Does the tag falsely declare the element, or is the element missing from the sdf?

[FirefoxMetzger]

The same is true for this element inside the metal element

https://github.com/ignitionrobotics/sdformat/blob/e4c658f14b73ab839d730c7a402a82a7dfa6a16e/test/sdf/material_pbr.sdf#L19

and the same element inside the specular element

https://github.com/ignitionrobotics/sdformat/blob/e4c658f14b73ab839d730c7a402a82a7dfa6a16e/test/sdf/material_pbr.sdf#L39

inside the metal element of the same file. They are not documented in v1.8 or v1.6 (the version of the test file).

[jennuine]

The sdf spec and website have been updated: http://sdformat.org/spec?ver=1.8&elem=material#specular_environment_map