The <fo:instream-foreign-object> object is used for inline graphics or for "generic" objects where the object's data resides as descendants of <fo:instream-foreign-object>, typically as an XML element sub-tree in a non-XSL namespace (a common format is SVG).
The content size of this object is defined by taking the size of the object and scaling specified by the content-height, content-width, and scaling properties.
If the content is too large for the area after scaling, the overflow property controls the clipping and scroll bars.
This object has a child from a non-XSL namespace. It also may have additional attributes in the non-XSL namespace.
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