Is there a hugo type reference somewhere?

Hey, I’m new to hugo and can’t find a good reference for all the Hugo types. For example on this image resource. Where can I browse all the properties (Permalink, Mediatype, Width, Height…)?

{{ with resources.Get $image }}
    <meta property="og:image" content="{{ .Permalink }}" />
    <meta property="og:image:type" content="{{ .MediaType }}" />
    <meta property="og:image:width" content="{{ .Width }}" />
    <meta property="og:image:height" content="{{ .Height }}" />
{{ end }}

Something like for Site Variables… Site Variables | Hugo
Why is there no documentation for all resources?

Where you see the properties there?