* Remove unused references from biblio.js
* Use specref for references with identical entries
* Change to versioned refs for Core AAM and AccName

Fixes github issue #701

* When aria-errormessage is not pertinent, authors MUST either ensure
  the content is not rendered or remove the aria-errormessage attribute
  or its value.
* User agents MUST NOT expose <code>aria-errormessage</code> for an object
  with an <sref>aria-invalid</sref> value of <code>false</code>.

Also some editorial cleanup

Addresses github issue #454.

* Issue #691

* Add blockquote, caption, and paragraph roles

…d paragraph

We have a script which automatically generates the list of roles which support
name from content. It turns out that script is merely looking for the presence
of listitem elements. We need to make the script more robust. In the meantime,
fix the immediate problem.

* fix #764

#774)

#785)

* Clarify whether alt attribute is valid alternative text for role="img" #783

There was a typo in the description of aria-live="off";
"unless the used is..." should be "unless the user is...".

…ion computation"

See w3c/accname#34

…th sibling steppers (#813)

* Change prose to author SHOULD from author MUST specify value for
  aria-valuenow.
* Change aria-valuemin and aria-valuemax from required to supported
  properties.
* Revise prose of paragraph with normative statements.
* Change description to clearly state that a text field with sibling
  buttons outside the spinbutton is permitted.
* Make related editorial change to consolidate keyboard requirements
  into a single paragraph.
* Make other related editorial revisions for clarity.

…n rules (#792)

This content was taken from the Core-AAM because it is information which
is platform independent and has nothing to do with accessibility API
mappings.

* New Accessibility Tree section needs intro #811

* Remove implicit value from heading role

* Remove default value for aria-expanded from combobox role

…1278)

* menuitemcheckbox: remove checkbox from superclasses,
add aria-checked to required attributes
* remove radio from menuitemradio superclasses,

revise guidance for delimiting menuitemradio groups to say authors MAY use separator(s) but SHOULD use group to be consistent with other menuitem descriptions and radiogroup description.

…e 1178 (#1223)

* Revise UA, AT, and checker guidance per agreed text in issue 1178
* Remove normative requirements related to ARIA 1.0 and ARIA 1.1 patterns as suggested by @cookiecrook
* described in -> defined by

#808)

…lbar and slider. (#1208)

* focusable->focused to resolve #1381