ISA-class               S4 Class ISA, initialization method
aFiles                  Get and set aFiles.
assayTab-class          S4 Class assayTab, initialization methods
getAssayFileNames       Retrieve the Assay File Name(s) per Study from
                        an ISA object.
getAssayTabs            Retrieve Assay Tables from an ISA object.
getStudyFileNames       Retrieve the Study Identifier(s) and Study File
                        Name(s) from an ISA object.
iContacts               Get and set iContacts.
iFileName               Get and set iFileName
iPubs                   Get and set iPubs.
invest                  Get and set invest.
isaPath                 Get and set path
oSR                     Get and set oSR
processAssay            Process assay tab data
readISATab              Read an ISA-Tab dataset into an R object.
sAssays                 Get and set sAssays.
sContacts               Get and set sContacts.
sDD                     Get and set sDD.
sFacts                  Get and set sFacts.
sFiles                  Get and set sFiles.
sProts                  Get and set sProts.
sPubs                   Get and set sPubs.
study                   Get and set study.
validISAObject          Check the validity of an object of class ISA.
writeISAtab             Write ISA-Tab object.
