filenamecharacter, the SAS database filename
accessedPOSIXct, the date last retrieved
uncompressednumeric, file size (bytes)
gzipnumeric, gzip compressed file size (bytes)
bzip2numeric, bzip2 compressed file size (bytes)
xznumeric, xz compressed file size (bytes)
urlcharacter, the Universal Resource Locator
PKGversioncharacter, the sas7bdat package version
messagecharacter, message returned by read.sas7bdat (if any)
SASreleasecharacter, SAS release
SAShostcharacter, SAS host platform
OSversioncharacter, OS version
OSmakercharacter, OS maker
OSnamecharacter, OS name
endiannesscharacter, endianness of header fields
winunixcharacter, platform type