A server generates a form identifier to identify a page or input area of a document; generates a location and field type for the input area of the document; associates the location and field type with the form identifier; and reproduces a second document with a graphically represented identifier converted from the form identifier. The location, field type, and form identifier are stored in metadata of the document. A client device obtains a form identifier converted from the graphically represented identifier from a handwriting device. The form identifier is associated with the location and field type for the input area of the second document. The form identifier, location, and field type are stored in metadata of the second document. The client device obtains a positional signal of handwriting from the handwriting device and associates the positional signal with the input area based on the form identifier, location, and field type.