Change is a Modifier that replaces the primary value of the Value.

Delete is a Modifier that removes the parameter with the given name from the Value.

Modify clones a Value, applies the given modifications (if any) and returns the new Value.

New creates a new parameterized header field with or without parameters.

Parse takes a header field body, parses it as a Value and returns it.

Set is a Modifier that sets a parameter with the given name on the Value.

Boundary is the name of the boundary parameter that may be present in the Content-type header.

Charset is the name of the charset parameter that may be present in the Content-type header.

Filename is the name of the filename parameter that may be present in the Content-disposition header.

Value represents a parsed parameterized header field, such as is used in the Content-type and Content-disposition headers.

Modifier is a modification to apply to a Value when calling the Modify() function.