A formal will is a set of written instructions by which a person communicates
how his or her property shall be disposed of after death.  The one who writes
a will is said to be a testator, or a testatrix if the person is female.
In the case of death where a will has been created, that person is said to die
testate.  In the absence of a will a person dies intestate.  A designee
instructed to handle the affairs of the estate is an executor or an executrix.
A will or any part thereof may be revoked or altered by a subsequent written
will, codicil or other writing, declaring such revocation or alteration;
provided, that the same formalities required for the execution of wills under
this law are observed in the execution of such will, codicil or other
writing.