The section element represents a generic document or application section. A section,in this context,is a thematic grouping of content,typically with a header and possibly a footer.

和

The article element represents an independent section of a document,page,or site. This could be a forum post,a magazine or newspaper article,a blog entry,a user-submitted comment,or any other independent item of content.

所以我会说这两个部分和文章元素可以包含其他元素,如果合适的话.我认为你的图表是有意义的,除了嵌套的部分元素：

The section element is not a generic container element. When an element is needed for styling purposes or as a convenience for scripting,authors are encouraged to use the div element instead. A general rule is that the section element is appropriate only if the element’s contents would be listed explicitly in the document’s outline.

也许使用< div>对于外面的？