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,
theintentistoexercisetherighttocontrolthedistributionof
derivative or collective works based on the Program.