Unitless CSS Lengths
Issues:
From www-svg@w3.org: http://lists.w3.org/Archives/Public/www-svg/2005Feb/0099 http://lists.w3.org/Archives/Public/www-svg/2005May/0218 http://lists.w3.org/Archives/Public/www-svg/2005Sep/0032 http://lists.w3.org/Archives/Public/www-svg/2005Sep/0033 http://lists.w3.org/Archives/Public/www-svg/2005Sep/0034 http://lists.w3.org/Archives/Public/www-svg/2005Sep/0035 http://lists.w3.org/Archives/Public/www-svg/2005Nov/0090
From www-style@w3.org: http://lists.w3.org/Archives/Public/www-style/2005Jul/0226 (see last sentence) http://lists.w3.org/Archives/Public/www-style/2005Jul/0289 http://lists.w3.org/Archives/Public/www-style/2005Jul/0292 http://lists.w3.org/Archives/Public/www-style/2005Jul/0293 http://lists.w3.org/Archives/Public/www-style/2005Oct/0154
Lengths must have units in CSS; without units some properties in CSS are ambiguous (e.g. 'font', 'line-height'). Unitless lengths are in fact not catered for by the CSS core syntax; implementations are unable to implement both SVG and CSS in the same cascade (as required by multi-namespace documents).
Properties that may be given a <length> value in CSS 2 are:
| background-position | [ [<percentage> | <length> ]{1,2} | [ [top | center | bottom] || [left | center | right] ] ] | inherit |
| border-spacing | <length> <length>? | inherit |
| bottom | <length> | <percentage> | auto | inherit |
| font | [ [ 'font-style' || 'font-variant' || 'font-weight' ]? 'font-size' [ / 'line-height' ]? 'font-family' ] | caption | icon | menu | message-box | small-caption | status-bar | inherit |
| font-size | <absolute-size> | <relative-size> | <length> | <percentage> | inherit |
| height | <length> | <percentage> | auto | inherit |
| left | <length> | <percentage> | auto | inherit |
| letter-spacing | normal | <length> | inherit |
| line-height | normal | <number> | <length> | <percentage> | inherit |
| marker-offset | <length> | auto | inherit |
| max-height | <length> | <percentage> | none | inherit |
| max-width | <length> | <percentage> | none | inherit |
| min-height | <length> | <percentage> | inherit |
| min-width | <length> | <percentage> | inherit |
| right | <length> | <percentage> | auto | inherit |
| size | <length>{1,2} | auto | portrait | landscape | inherit |
| text-indent | <length> | <percentage> | inherit |
| text-shadow | none | [<color> || <length> <length> <length>? ,]* [<color> || <length> <length> <length>?] | inherit |
| top | <length> | <percentage> | auto | inherit |
| vertical-align | baseline | sub | super | top | text-top | middle | bottom | text-bottom | <percentage> | <length> | inherit |
| width | <length> | <percentage> | auto | inherit |
| word-spacing | normal | <length> | inherit |
