I wrote:
1) The action part specifies the label or the class that is assigned to the matching node (e.g. content, noise)
Can I write the relative clause in the following forms? If yes, which of these three options are better?
2) The action part specifies the label or the class to be assigned to the matching node (e.g. content, noise)
3) The action part specifies the label or the class to assign the matching node (e.g. content, noise)
4) The action part specifies the label or the class of the matching node (e.g. content, noise)