User's Manual

92
2. You may modify your copy or copies of the Program or any
portionofit,thusformingaworkbasedontheProgram,and
copyanddistributesuchmodicationsorworkunderthe
termsofSection1above,providedthatyoualsomeetallof
these conditions:
a) You must cause the modied les to carry prominent
notices stating that you changed the les and the date of
any change.
 b) Youmustcauseanyworkthatyoudistributeorpublish,
that in whole or in part contains or is derived from the
Programoranypartthereof,tobelicensedasawhole
at no charge to all third parties under the terms of this
License.
c) If the modied program normally reads commands
interactively when run, you must cause it, when started
running for such interactive use in the most ordinary
way, to print or display an announcement including an
appropriate copyright notice and a notice that there is
no warranty (or else, saying that you provide a warranty)
andthatusersmayredistributetheprogramunderthese
conditions, and telling the user how to view a copy of
thisLicense.(Exception:iftheProgramitselfisinteractive
butdoesnotnormallyprintsuchanannouncement,your
workbasedontheProgramisnotrequiredtoprintan
announcement.)
These requirements apply to the modied work as a whole.
Ifidentiablesectionsofthatworkarenotderivedfromthe
Program,andcanbereasonablyconsideredindependentand
separate works in themselves, then this License, and its terms,
donotapplytothosesectionswhenyoudistributethemas
separateworks.Butwhenyoudistributethesamesections
aspartofawholewhichisaworkbasedontheProgram,the
distributionofthewholemustbeonthetermsofthisLicense,
whosepermissionsforotherlicenseesextendtotheentire
whole, and thus to each and every part regardless of who
wrote it.
Thus, it is not the intent of this section to claim rights or
contestyourrightstoworkwrittenentirelybyyou;rather,