SVG 2 new features

I'd like to move this into a proper matrix where we can list implementer feedback and support, but for now here's a basic list of what is new in SVG 2.

Note: this list is still being built and is incomplete.

API Changes

• Added "length" attribute and indexed property access to all list interfaces.
• Replace SVGMatrix with DOMMatrix or DOMMatrixReadOnly
• Replace SVGRect with DOMRect or DOMRectReadOnly
• Replace SVGPoint with DOMPoint or DOMPointReadOnly
• Moved members from SVGStylable and SVGLangSpace to SVGElement and removed those interfaces
• Added SVGGraphicsElement
• Moved members from SVGLocatable and SVGTransformable to SVGGraphicsElement and removed those interfaces
• Added SVGGeometryElement with isPointInFill and isPointInStroke methods
• Removed SVGExternalResourcesRequired interface
• Removed SVGColor and SVGICCCOlor interfaces
• Removed getPresentationAttribute method from SVGElement
• Add tabindex attribute, and focus and blur methods, to SVGElement
• Add activeElement attribute to Document
• SVGElement now inherits GlobalEventHandlers from HTML
• extend getBBox with an argument that controls inclusion of fill or stroke
• Remove xmlbase, xmllang, and xmlspace attributes from SVGElement interface
• Remove SVGViewSpec interface
• Remove getTransformToElement from SVGGraphicsElement
• Allow getCTM on outermost svg element
• Make animVal an alias for baseVal and no longer reflect animated value
• Added dataset attribute to SVGElement
• Moved methods pathLength, getTotalLength, and getPointAtLength to SVGGeometryElement
• Removed SVGElementInstance and SVGElementInstanceList interfaces
• Removed currentView and useCurrentView properties on SVGSVGElement
• Added SVGUnknownElement
• Removed the viewport attribute from SVGSVGElement

Markup Changes

• Allow the script element anywhere
• Add crossorigin attribute to the image and script elements
• Whitespace now includes form feed (U+000C) to align with HTML and CSS
• Allow auto for width and height on image
• Removed externalResourcesRequired attribute
• Add lang attribute
• Include WAI-ARIA attributes
• width and height on svg element are now presentation attributes
• Removed baseProfile and version attributes from the svg element
• Removed requiredFeatures attribute
• unknown elements are treated as a g or tspan element
• Removed xml:base
• Allow custom data attributes on all SVG elements

Document Features

• Inclusion of audio and video elements
• Mesh gradients
• Hatch path paint server
• Multiple paints for fill and stroke.
• 'context-fill' and 'context-stroke' values for 'fill' and 'stroke' These allow, for example, markers to inherit the stroke color.
• Marker auto-start-reverse
  Has implementations in Firefox, WebKit, Blink, and Inkscape
• Complete overhaul of text layout
  • CSS based multi-line text:
    • Text wrapping given a fixed width/height.
    • Text in a shape.
  • Text-on-a-path changes:
    • Text on a shape.
    • Text on either side of a path.
  • Todo: Add more
• Font features (alternative glyphs, etc.)
• Path features:
  • Auto-closing paths.
  • New line joins (miter-clip, arcs)
• z-index support
• SVG Root and foreignObject are no longer overflow:hidden by default
• Allow scroll bars to be shown for overflow:auto in special cases
• Allow scroll bars when overflow:scroll is set on svg elements
• Use elements defined in terms of Web Components
  • use elements may now reference an entire document
• Define WAI-ARIA semantics
• ordering of systemLanguage preferences follows SMIL allowReorder definition
• masks, filters and other graphics effects may now be applied to tspan and textPath elements

Deprecated

• methods suspendRedraw, unsuspendRedraw, and unsuspendRedrawAll on SVGSVGElement
• rootElement attribute
• forceRedraw method on SVGSVGElement
• deselectAll method on SVGSVGElement