[css-fonts] is font variant a list?

A quibble about this example versus the property definition from the
css-fonts draft:

p {
  font-variant: discretionary-ligatures,
                character-variant(leo-B, leo-M, leo-N, leo-T, leo-U);
}

The property definition for font-variant
<http://dev.w3.org/csswg/css-fonts/#descdef-font-variant> doesn't seem to
allow lists.

Name:font-variantValue:normal
<http://dev.w3.org/csswg/css-fonts/#font-variant-normal-value> | none
<http://dev.w3.org/csswg/css-fonts/#font-variant-none-value> | [
<common-lig-values> <http://dev.w3.org/csswg/css-fonts/#common-lig-values>
 || <discretionary-lig-values>
<http://dev.w3.org/csswg/css-fonts/#discretionary-lig-values> ||
<historical-lig-values>
<http://dev.w3.org/csswg/css-fonts/#historical-lig-values> ||
<contextual-alt-values>
<http://dev.w3.org/csswg/css-fonts/#contextual-alt-values> ||
stylistic(<feature-value-name>)
<http://dev.w3.org/csswg/css-fonts/#stylistic> || historical-forms
<http://dev.w3.org/csswg/css-fonts/#historical-forms> ||
styleset(<feature-value-name>
#) <http://dev.w3.org/csswg/css-fonts/#styleset> ||
character-variant(<feature-value-name>
#) <http://dev.w3.org/csswg/css-fonts/#character-variant> ||
swash(<feature-value-name>) <http://dev.w3.org/csswg/css-fonts/#swash> ||
ornaments(<feature-value-name>)
<http://dev.w3.org/csswg/css-fonts/#ornaments> ||
annotation(<feature-value-name>)
<http://dev.w3.org/csswg/css-fonts/#annotation> || [ small-caps
<http://dev.w3.org/csswg/css-fonts/#small-caps> | all-small-caps
<http://dev.w3.org/csswg/css-fonts/#all-small-caps> |petite-caps
<http://dev.w3.org/csswg/css-fonts/#petite-caps> | all-petite-caps
<http://dev.w3.org/csswg/css-fonts/#all-petite-caps> | unicase
<http://dev.w3.org/csswg/css-fonts/#unicase> | titling-caps
<http://dev.w3.org/csswg/css-fonts/#titling-caps> ] ||
<numeric-figure-values>
<http://dev.w3.org/csswg/css-fonts/#numeric-figure-values> ||
<numeric-spacing-values>
<http://dev.w3.org/csswg/css-fonts/#numeric-spacing-values> ||
<numeric-fraction-values>
<http://dev.w3.org/csswg/css-fonts/#numeric-fraction-values> || ordinal
<http://dev.w3.org/csswg/css-fonts/#ordinal> || slashed-zero
<http://dev.w3.org/csswg/css-fonts/#slashed-zero> ||
<east-asian-variant-values>
<http://dev.w3.org/csswg/css-fonts/#east-asian-variant-values> ||
<east-asian-width-values>
<http://dev.w3.org/csswg/css-fonts/#east-asian-width-values> || ruby
<http://dev.w3.org/csswg/css-fonts/#ruby> ]Should the definition allow
lists? I.E. 'Value: normal | none | [ <common-lig-values || ... || ruby ]#

- David