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The clip-rule attribute only applies to graphics elements that are contained within a <clipPath> element. The clip-rule attribute basically works as the fill-rule attribute, except that it applies to <clipPath> definitions.
The following fragment of code will cause an evenodd clipping rule to be applied to the clipping path because clip-rule is specified on the <path> element that defines the clipping shape:
<g>
    <clipPath id="MyClip">
        <path d="..." clip-rule="evenodd" />
    </clipPath>
    <rect clip-path="url(#MyClip)" ... />
</g>
whereas the following fragment of code will not cause an evenodd clipping rule to be applied because the clip-rule is specified on the referencing element, not on the object defining the clipping shape:
<g>
    <clipPath id="MyClip">
        <path d="..." />
    </clipPath>
    <rect clip-path="url(#MyClip)" clip-rule="evenodd" ... />
</g>
As a presentation attribute, it also can be used as a property directly inside a CSS stylesheet
Usage context
| Categories | Presentation attribute | 
|---|---|
| Value | nonzero | evenodd | inherit | 
| Animatable | Yes | 
| Normative document | SVG 1.1 (2nd Edition) | 
Example
Elements
The following elements can use the clip-rule attribute, but only if they are inside a <clipPath> element.