| as.data.frame.anchor | Anchor: |
| html.htmlelement | HtmlElement: 一个标签所标记的元素以及内部文本 |
| parse | |
| getElementById | get html element by its id |
| getElementsByTagName | get a collection of elements with specific tag name |
| getElementsByClass | |
| cast | cast the document element model as the node element object model? |
| tables | query a list of html tables in the given html page text document |
| title | Parsing the title text from the html inputs. |
| link | parse one line url from the given html document string fragment |
| plainText | get all internal document text from the given html document text. |