| accent-height | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| accumulate | feImage, svg, g, defs, symbol, use, switch, marker, pattern, mask, filter, a, font, glyph, missing-glyph, foreignObject, text, tspan, tref, textPath, altGlyph, clipPath | | 1.1 | Yes |
| alphabetic | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| amplitude | feFuncR, feFuncG, feFuncB, feFuncA | | 1.1 | Yes |
| arabic-form | glyph | | 1.1 | Yes |
| ascent | font-face | | 1.1 | Yes |
| attributeType | animate, set, animateColor, animateTransform | | 1.1 | Yes |
| azimuth | feDistantLight | | 1.1 | Yes |
| baseFrequency | feTurbulence | | 1.1 | Yes |
| baseProfile | svg | Not used in rendering. | 1.1 | No |
| bbox | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| bias | feConvolveMatrix | | 1.1 | Yes |
| by | animate, animateColor, animateTransform, animateMotion | | 1.1 | Yes |
| calcMode | animateMotion | | 1.1 | Yes |
| cap-height | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| class | all elements | | 1.1 | Yes |
| clipPathUnits | clipPath | | 1.1 | Yes |
| contentScriptType | svg | | 1.1 | Yes |
| contentStyleType | svg | | 1.1 | Yes |
| cx | circle, ellipse, radialGradient | | 1.1 | Yes |
| cy | circle, ellipse, radialGradient | | 1.1 | Yes |
| d | glyph, missing-glyph, path | | 1.1 | Yes |
| descent | font-face | | 1.1 | Yes |
| diffuseConstant | feDiffuseLightning | | 1.1 | Yes |
| direction | feImage, svg, g, defs, symbol, use, switch, marker, pattern, mask, filter, a, font, glyph, missing-glyph, foreignObject, text, tspan, tref, textPath, altGlyph, clipPath | | 1.1 | Yes |
| divisor | feConvolveMatrix | | 1.1 | Yes |
| dur | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| dx | text, tspan, tref, altGlyph, glyphRef, feOffset | | 1.1 | Yes |
| dy | text, tspan, tref, altGlyph, glyphRef, feOffset | | 1.1 | Yes |
| edgeMode | feConvolveMatrix | | 1.1 | Yes |
| editable | text, textArea | | 1.2 | Yes |
| elevation | feDistantLight | | 1.1 | Yes |
| end | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| exponent | feFuncR, feFuncG, feFuncB, feFuncA | | 1.1 | Yes |
| externalResourcesRequired | g, defs, symbol, use, image, switch, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, marker, linearGradient, radialGradient, pattern, clipPath, mask, filter, feImage, cursor, a, view, script, animate, set, animateMotion, animateColor, animateTransform, font, foreignObject, svg, mpath | | 1.1 | Yes |
| fill | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| filterRes | filter | | 1.1 | Yes |
| filterUnits | filter | | 1.1 | Yes |
| focusHighlight | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| focusable | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| font-family | font-face | | 1.1 | Yes |
| font-size | font-face | | 1.1 | Yes |
| font-stretch | font-face | | 1.1 | No |
| font-style | font-face | | 1.1 | Yes |
| font-variant | font-face | | 1.1 | Yes |
| font-weight | font-face | | 1.1 | Yes |
| format | altGlyph, glyphRef | The altGlyph and glyphRef elements are not supported | 1.1 | No |
| from | animate, animateColor, animateTransform, animateMotion | | 1.1 | Yes |
| fx | radialGradient | | 1.1 | Yes |
| fy | radialGradient | | 1.1 | Yes |
| g1 | hkern, vkern | | 1.1 | Yes |
| g2 | hkern, vkern | | 1.1 | Yes |
| glyph-name | glyph | | 1.1 | Yes |
| glyphRef | altGlyph, glyphRef | The altGlyph and glyphRef elements are not supported | 1.1 | No |
| gradientTransform | radialGradient, linearGradient | | 1.1 | Yes |
| gradientUnits | radialGradient, linearGradient | | 1.1 | Yes |
| hanging | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| height | svg, filter, feMerge, feTurbulence, use, pattern, mask, rect, foreignObject, image | | 1.1 | Yes |
| horiz-adv-x | glyph, missing-glyph, font | | 1.1 | Yes |
| horiz-origin-x | glyph, missing-glyph, font | Origin is always at (0,0) | 1.1 | No |
| horiz-origin-y | glyph, missing-glyph, font | Origin is always at (0,0) | 1.1 | No |
| ideographic | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| in | feComponentTransfer, feFlood, feTile, feBlend, feColorMatrix, feComposite, feConvolveMatrix, feDiffuseLighting, feDisplacementMap, feGaussianBlur, feMorphology, feOffset, feSpecularLighting, feMergeNode | | 1.1 | Yes |
| in2 | feBlend, feComposite, feDisplacementMap | | 1.1 | Yes |
| initialVisibility | video, animation | Not used in rendering but checked during parsing. | 1.2 | No |
| intercept | feFuncR, feFuncG, feFuncB, feFuncA | | 1.1 | Yes |
| k | hkern, vkern | | 1.1 | Yes |
| k1 | feComposite | | 1.1 | Yes |
| k2 | feComposite | | 1.1 | Yes |
| k3 | feComposite | | 1.1 | Yes |
| k4 | feComposite | | 1.1 | Yes |
| kernelMatrix | feConvolveMatrix | | 1.1 | Yes |
| kernelUnitLength | feConvolveMatrix, feDiffuseLighting, feSpecularLighting | | 1.1 | Yes |
| keyPoints | animateMotion | | 1.1 | Yes |
| keySplines | animate, animateColor, animateTransform, animateMotion | | 1.1 | Yes |
| keyTimes | animate, animateColor, animateTransform, animateMotion | | 1.1 | Yes |
| lang | glyph | Language information not used when selecting glyphs. | 1.1 | No |
| lengthAdjust | textPath, text, tspan, tref | | 1.1 | Yes |
| limitingConeAngle | feSpotLight | | 1.1 | Yes |
| local | color-profile | | 1.1 | No |
| markerHeight | marker | | 1.1 | Yes |
| markerUnits | marker | | 1.1 | Yes |
| markerWidth | marker | | 1.1 | Yes |
| maskContentUnits | mask | | 1.1 | Yes |
| maskUnits | mask | | 1.1 | Yes |
| mathematical | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| max | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| media | style | | 1.1 | No |
| method | textPath | | 1.1 | Yes |
| min | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| mode | feBlend | | 1.1 | Yes |
| name | color-profile | | 1.1 | No |
| nav-down | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-down-left | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-down-right | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-left | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-next | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-prev | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-right | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-up | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-up-left | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| nav-up-right | a, animation, circle, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, svg, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| numOctaves | feTurbulence | | 1.1 | Yes |
| offset | stop, feFuncR, feFuncG, feFuncB, feFuncA | | 1.1 | Yes |
| onabort | svg | | 1.1 | Yes |
| onactivate | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | The event listener is registered, but currently the event itself is never dispatched in Opera. | 1.1 | Yes |
| onbegin | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| onclick | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onend | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| onerror | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| onfocusin | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onfocusout | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onload | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onmousedown | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onmousemove | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onmouseout | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onmouseover | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onmouseup | g, defs, symbol, switch, svg, use, image, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, a, foreignObject | | 1.1 | Yes |
| onrepeat | animate, set, animateMotion, animateColor, animateTransform | Some events may be dropped if there's not enough time to handle them, for example when the duration of an animation is shorter than the time it takes to render the svg. | 1.1 | Yes |
| onresize | svg | | 1.1 | Yes |
| onscroll | svg | | 1.1 | Yes |
| onunload | svg | The event listener is registered, but currently the event itself is never dispatched in Opera. | 1.1 | Yes |
| onzoom | svg | | 1.1 | Yes |
| operator | feMorphology, feComposite | | 1.1 | Yes |
| order | feConvolveMatrix | | 1.1 | Yes |
| orient | marker | | 1.1 | Yes |
| orientation | glyph | | 1.1 | No |
| overline-position | font-face | | 1.1 | Yes |
| overline-thickness | font-face | | 1.1 | Yes |
| panose-1 | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| path | animateMotion | | 1.1 | Yes |
| pathLength | path | | 1.1 | Yes |
| patternContentUnits | pattern | | 1.1 | Yes |
| patternTransform | pattern | | 1.1 | Yes |
| patternUnits | pattern | | 1.1 | Yes |
| points | polyline, polygon | | 1.1 | Yes |
| pointsAtX | feSpotLight | | 1.1 | Yes |
| pointsAtY | feSpotLight | | 1.1 | Yes |
| pointsAtZ | feSpotLight | | 1.1 | Yes |
| preserveAlpha | feConvolveMatrix | | 1.1 | Yes |
| preserveAspectRatio | svg, symbol, image, marker, pattern, view | | 1.1 | Yes |
| primitiveUnits | filter | | 1.1 | Yes |
| r | radialGradient, circle | | 1.1 | Yes |
| radius | feMorphology | | 1.1 | Yes |
| refX | marker | | 1.1 | Yes |
| refY | marker | | 1.1 | Yes |
| rendering-intent | color-profile | | 1.1 | No |
| repeatCount | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| repeatDur | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| requiredExtensions | svg, g, defs, use, image, switch, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, pattern, clipPath, mask, cursor, a, animate, set, animateMotion, animateColor, animateTransform, foreignObject | | 1.1 | Yes |
| requiredFeatures | svg, g, defs, use, image, switch, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, pattern, clipPath, mask, cursor, a, animate, set, animateMotion, animateColor, animateTransform, foreignObject | | 1.1 | Yes |
| requiredFonts | a, animate, animateColor, animateMotion, animateTransform, animation, audio, circle, discard, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, set, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| requiredFormats | a, animate, animateColor, animateMotion, animateTransform, animation, audio, circle, discard, ellipse, foreignObject, g, image, line, path, polygon, polyline, rect, set, switch, text, textArea, tspan, use, video | | 1.2 | Yes |
| restart | animate, set, animateMotion, animateColor, animateTransform | | 1.1 | Yes |
| result | feMerge, feTurbulence | | 1.1 | Yes |
| rotate | animateMotion, text, tspan, tref, altGlyph | | 1.1 | Yes |
| rx | rect, ellipse | | 1.1 | Yes |
| ry | rect, ellipse | | 1.1 | Yes |
| scale | feDisplacementMap | | 1.1 | Yes |
| seed | feTurbulence | | 1.1 | Yes |
| slope | feFuncR, feFuncG, feFuncB, feFuncA | | 1.1 | Yes |
| slope | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| snapshotTime | svg | Not used in rendering but checked during parsing. | 1.2 | No |
| spacing | textPath | | 1.1 | No |
| specularConstant | feSpecularLighting | | 1.1 | Yes |
| specularConstant | feSpecularLighting | | 1.1 | Yes |
| specularExponent | feSpecularLighting, feSpotLight | | 1.1 | Yes |
| spreadMethod | linearGradient, radialGradient | | 1.1 | Yes |
| startOffset | textPath | | 1.1 | Yes |
| stdDeviation | feGaussianBlur | | 1.1 | Yes |
| stemh | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| stemv | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| stitchTiles | feTurbulence | | 1.1 | Yes |
| strikethrough-position | font-face | | 1.1 | Yes |
| strikethrough-thickness | font-face | | 1.1 | Yes |
| style | svg, g, defs, desc, title, symbol, use, image, switch, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, glyphRef, marker, linearGradient, radialGradient, stop, pattern, clipPath, mask, filter, feImage, a, font, glyph, missing-glyph, foreignObject | | 1.1 | Yes |
| surfaceScale | feDiffuseLighting, feSpecularLighting | | 1.1 | Yes |
| syncBehavior | audio, video, animation | Parsing only. | 1.2 | No |
| syncBehaviorDefault | audio, video, animation | Parsing only. | 1.2 | No |
| syncMaster | audio, video, animation | | 1.2 | No |
| syncTolerance | audio, video, animation | | 1.2 | No |
| syncToleranceDefault | audio, video, animation | | 1.2 | No |
| systemLanguage | svg, g, defs, use, image, switch, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, pattern, clipPath, mask, cursor, a, animate, set, animateMotion, animateColor, animateTransform, foreignObject | | 1.1 | Yes |
| tableValues | feFuncR, feFuncG, feFuncB, feFuncA | | 1.1 | Yes |
| target | a | | 1.1 | Yes |
| targetX | feConvolveMatrix | | 1.1 | Yes |
| targetY | feConvolveMatrix | | 1.1 | Yes |
| textLength | text, tspan, tref, textPath | | 1.1 | Yes |
| title | style | | 1.1 | No |
| to | animate, animateColor, animateTransform, animateMotion, set | | 1.1 | Yes |
| transform | g, defs, use, image, switch, path, rect, circle, ellipse, line, polyline, polygon, text, clipPath, a, foreignObject | | 1.1 | Yes |
| type | feTurbulence, feColorMatrix, feFuncR, feFuncG, feFuncB, feFuncA, animateTransform, script, style, handler | | 1.1 | Yes |
| u1 | hkern, vkern | | 1.1 | No |
| u2 | hkern, vkern | | 1.1 | No |
| underline-position | font-face | | 1.1 | Yes |
| underline-thickness | font-face | | 1.1 | Yes |
| unicode | glyph | | 1.1 | Yes |
| unicode-range | font-face | Font selection based on presence of glyphs in unicode blocks. | 1.1 | No |
| units-per-em | font-face | | 1.1 | Yes |
| v-alphabetic | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| v-hanging | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| v-ideographic | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| v-mathematical | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| values | animate, animateColor, animateTransform, animateMotion, feColorMatrix | | 1.1 | Yes |
| version | svg | Always uses the same interpretation of the SVG. | 1.1 | No |
| vert-adv-y | font, glyph, missing-glyph | | 1.1 | Yes |
| vert-origin-x | font, glyph, missing-glyph | Origin is always (0,0). | 1.1 | No |
| vert-origin-y | font, glyph, missing-glyph | Origin is always (0,0). | 1.1 | No |
| viewBox | svg, symbol, marker, pattern, view | | 1.1 | Yes |
| viewTarget | view | | 1.1 | No |
| width | svg, use, pattern, mask, filter, feMerge, feTurbulence | | 1.1 | Yes |
| widths | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| x | glyphRef, fePointLight, feSpotLight, text, tspan, tref, altGlyph, svg, use, image, rect, pattern, mask, filter, feMerge, feTurbulence, cursor, foreignObject | | 1.1 | Yes |
| x-height | font-face | Not used in rendering but checked during parsing. | 1.1 | No |
| x1 | line, linearGradient | | 1.1 | Yes |
| x2 | line, linearGradient | | 1.1 | Yes |
| xChannelSelector | feDisplacementMap | | 1.1 | Yes |
| xlink:actuate | tref, textPath, altGlyph, glyphRef, color-profile, linearGradient, radialGradient, pattern, filter, cursor, script, mpath, font-face-uri, definition-src, use, image, feImage, a | | 1.1 | No |
| xlink:arcrole | tref, textPath, altGlyph, glyphRef, color-profile, linearGradient, radialGradient, pattern, filter, cursor, script, mpath, font-face-uri, definition-src, use, image, feImage, a | | 1.1 | No |
| xlink:href | glyphRef, color-profile, linearGradient, radialGradient, pattern, filter, script, animElementAttrs, altGlyph, use, image, tref, textPath, feImage, cursor, a, mpath, font-face-uri, definition-src | | 1.1 | Yes |
| xlink:role | tref, textPath, altGlyph, glyphRef, color-profile, linearGradient, radialGradient, pattern, filter, cursor, script, mpath, font-face-uri, definition-src, use, image, feImage, a | | 1.1 | No |
| xlink:show | tref, textPath, altGlyph, glyphRef, color-profile, linearGradient, radialGradient, pattern, filter, cursor, script, mpath, font-face-uri, definition-src, use, image, feImage, a | | 1.1 | Yes |
| xlink:title | tref, textPath, altGlyph, glyphRef, color-profile, linearGradient, radialGradient, pattern, filter, cursor, script, mpath, font-face-uri, definition-src, use, image, feImage, a | | 1.1 | Yes |
| xlink:type | tref, textPath, altGlyph, glyphRef, color-profile, linearGradient, radialGradient, pattern, filter, cursor, script, mpath, font-face-uri, definition-src, use, image, feImage, a | | 1.1 | No |
| xml:base | altGlyphDef, altGlyphItem, font-face-src, metadata, svg, g, defs, desc, title, symbol, use, image, switch, style, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, glyphRef, marker, color-profile, linearGradient, radialGradient, stop, pattern, clipPath, mask, filter, feDistantLight, fePointLight, feSpotLight, feBlend, feColorMatrix, feComponentTransfer, feFuncR, feFuncG, feFuncB, feFuncA, feComposite, feConvolveMatrix, feDiffuseLighting, feDisplacementMap, feFlood, feGaussianBlur, feImage, feMerge, feMergeNode, feMorphology, feOffset, feSpecularLighting, feTile, feTurbulence, cursor, a, view, script, animate, set, animateMotion, mpath, animateColor, animateTransform, font, glyph, missing-glyph, hkern, vkern, font-face, font-face-uri, font-face-format, font-face-name, definition-src, foreignObject | | 1.1 | Yes |
| xml:space | svg, g, defs, desc, title, symbol, use, image, switch, path, rect, circle, ellipse, line, polyline, polygon, text, tspan, tref, textPath, altGlyph, marker, pattern, clipPath, mask, filter, feImage, a, foreignObject, style | | 1.1 | Yes |
| xmlns | svg | | 1.1 | Yes |
| xmlns:xlink | a | | 1.1 | Yes |
| y | svg, use, image, rect, pattern, mask, filter, feMerge, feTurbulence, foreignObject, cursor, text, tspan, tref, altGlyph, glyphRef, fePointLight, feSpotLight | | 1.1 | Yes |
| y1 | line, linearGradient | | 1.1 | Yes |
| y2 | line, linearGradient | | 1.1 | Yes |
| yChannelSelector | feDisplacementMap | | 1.1 | Yes |
| z | feSpotLight, fePointLight | | 1.1 | Yes |
| zoomAndPan | svg, view | | 1.1 | Yes |