" name — Metadata name http-equiv — Prag..."

[SteveComstock]

https://html.spec.whatwg.org/multipage/semantics.html#the-meta-element:attr-meta-name-2

name — Metadata name
http\-equiv — Pragma directive
content — Value of the element
charset — Character encoding declaration
media — Applicable media

Accessibility considerations:​
For authors.
For implementers.
DOM interface:​

\[Exposed=​Window\]
interface HTMLMetaElement :​ HTMLElement \{
  \[HTMLConstructor\] constructor\(\);

  \[CEReactions\] attribute DOMString name;
  \[CEReactions\] attribute DOMString httpEquiv;
  \[CEReactions\] attribute DOMString content;
  \[CEReactions\] attribute DOMString media;

  // also has obsolete members

1. The list of attributes includes "charset" but the interface list does not include this - why?
2. The link to obsolete members does not list what those are

[domenic]

1. The list of attributes includes "charset" but the interface list does not include this - why?

Because it's not mutable from script; it only affects parsing time.

2. The link to obsolete members does not list what those are

Yes, that's how hyperlinks work; you click on them in order to read what's located at the other end.