
// Basic datatypes

angle
length
nonNegativeLength
    Can't be expressed nicely. Will be a runtime check where needed.
percent
positiveLength

// Attributes with specific value types.

19.348 number:format-source
19.368 number:transliteration-style
19.484 style:font-family-generic
19.485 style:font-pitch
19.509 style:page-usage
19.519 style:type
19.534 svg:font-stretch

20.183.2 fo:border
20.184 style:break-after
20.185 style:break-before
20.190 fo:font-size
20.191 fo:font-style
20.192 fo:font-variant
20.193 fo:font-weight
20.196 fo:hyphenation-keep
20.197 fo:hyphenation-ladder-count
20.200 fo:keep-together
    20.201 fo:keep-with-next
20.203 fo:letter-spacing
20.204 fo:line-height
20.205 fo:margin
    20.206 fo:margin-bottom
    20.207 fo:margin-left
    20.208 fo:margin-right
    20.209 fo:margin-top
20.223 fo:text-align
20.224 fo:text-align-last
20.225 fo:text-indent
20.227 fo:text-transform
20.230 fo:wrap-option
20.253 style:cell-protect
20.263 style:direction
20.283 style:font-relief
20.297 style:glyph-orientation-vertical

20.315 style:line-break
20.322 style:num-format
20.328 style:page-number
20.330 style:print
20.332 style:print-page-order
20.333 style:print-orientation
20.335 style:punctuation-wrap
20.340 style:rel-width
20.346 style:rotation-align
20.363 style:table-centering
20.364 style:text-align-source
20.365 style:text-autospace
20.367 style:text-combine
20.370 style:text-emphasize
20.372 style:text-line-through-mode
20.373 style:text-line-through-style
20.376 style:text-line-through-type
20.377 style:text-line-through-width
    20.380 style:text-overline-mode
    20.381 style:text-overline-style
    20.382 style:text-overline-type
    20.383 style:text-overline-width
20.384 style:text-position
20.386 style:text-rotation-scale
    20.389 style:text-underline-mode
    20.390 style:text-underline-style
    20.391 style:text-underline-type
    20.392 style:text-underline-width
20.396 style:vertical-align

20.404 style:writing-mode
20.414 table:align
20.415 table:border-model
20.426 text:condition
20.427 text:display





