Svg Pattern Tag Removed using ngSanitize

[samypr100]

On the documentation in $sanitize code there is no mention as to why <pattern> is removed when sanitizing svg elements. Something similar happens when using <clipPath>. Is this indented? I believe it should be mentioned in the docs that they are not on the list if it's for some purpose.
https://developer.mozilla.org/en-US/docs/Web/SVG/Element/pattern
https://developer.mozilla.org/en-US/docs/Web/SVG/Element/clipPath

[Narretz]

I assume this is just an oversight, although I don't know if it can be a security issue.

[Narretz]

The sanitize svg whitelist seems to be based on the feedparser whitelist (https://pythonhosted.org/feedparser/html-sanitization.html#svg-sanitization), which doesn't contain these elements. I can't say why though.

[gkalpak]

As pointed out by @Narretz, you can manually work around this with #13282.