libxmlVersion: Query the version and available features of the libxml...
In cosmicexplorer/xmlr: Tools for parsing and generating XML within R and S-Plus.

Description Usage Arguments Value Author(s) References Examples

libxmlVersion retrieves the version of the libxml library used when installing this XML package. libxmlFeatures returns a named logical vector indicating which features are enabled.

1 2	libxmlVersion(runTime = FALSE) libxmlFeatures()

runTime

a logical value indicating whether to retrieve the version information describing libxml when the R package was compiled or the run-time version. These may be different if a) a new version of libxml2 is installed after the package is installed, b) if the package was installed as a binary package built on a different machine.

libxmlVersion returns a named list with fields

`major`	the major version number, either 1 or 2 indicating the old or new-style library.
`minor`	the within version release number.
`patch`	the within minor release version number

libxmlFeatures returns a logical vector with names given by: [1] "THREAD" "TREE" "OUTPUT" "PUSH" "READER" [6] "PATTERN" "WRITER" "SAX1" "FTP" "HTTP" [11] "VALID" "HTML" "LEGACY" "C14N" "CATALOG" [16] "XPATH" "XPTR" "XINCLUDE" "ICONV" "ISO8859X" [21] "UNICODE" "REGEXP" "AUTOMATA" "EXPR" "SCHEMAS" [26] "SCHEMATRON" "MODULES" "DEBUG" "DEBUG_MEM" "DEBUG_RUN" [31] "ZLIB" Elements are either TRUE or FALSE indicating whether support was activatd for that feature, or NA if that feature is not part of the particular version of libcurl.

Duncan Temple Lang

http://www.w3.org/XML, http://www.xmlsoft.org, http://www.omegahat.org

 ver <- libxmlVersion()
 if(is.null(ver)) {
   cat("Relly old version of libxml\n")
 } else {
   if(ver$major > 1) {
     cat("Using libxml2\n")
   }
 }