The RDFpro command line tool is packaged as a self-contained, cross-platform Java 8 application. In order to install it, download one of the following packages and unpack it in the location you prefer (if you are interested in the PHP web interface of RDFpro, please refer to this page):

You can run RDFpro by executing the rdfpro script. For instance, you can test if everything works correctly by executing the following command, which should display the tool version and other relevant system information:

$ rdfpro -v
RDF Processor Tool (RDFpro) 0.6
Java 64 bit (Oracle Corporation) 1.8.0_25
This is free software released into the public domain

RDFpro configuration is performed either editing its configuration file etc/ (syntax property = value) or by supplying configuration properties as Java system properties (export JAVA_OPTS="-Dproperty=value") or as environment variables (export PROPERTY=value, with property name uppercase with dots replaced with underlines). Logging is controlled by file etc/logback.xml. Custom prefix/namespace bindings can be added (possibly overriding the ones predefined in RDFpro and taken from by manually modifying the file etc/rdfpro.prefixes. JARs with additional RDFpro processors can be placed under lib.

Additional installation steps for Windows users. Windows users should perform the following steps in order to access all the features of RDFpro:

  • Obtain sort, gzip and bzip2 for Windows. The Windows versions of these utilities can be obtained from the GnuWin project. We suggest to install all the GnuWin utilities using GetGnuWin and then add the c:\gnuwin32 directory to the PATH system variable. Alternatively, you can edit file etc/ and set properties rdfpro.cmd.sort, rdfpro.cmd.gzip and rdfpro.cmd.bzip2 to the full paths of the corresponding utilities. Beware that there is a name clash between the GnuWin sort utility and the (different) Windows sort utility: either you add the c:\gnuwin32 folder as the first PATH entry or you manually edit etc/ setting rdfpro.cmd.sort = C:/gnuwin32/bin/sort.exe (we suggest the latter option).

  • Enable ANSI escape sequences on Windows command prompt (strongly suggested, not mandatory). RDFpro uses ANSI escape sequences for colored output and for displaying informative status messages during long operations. These features are both disabled on Windows as the Windows console does not support ANSI escape codes. To enable them you have to install ansicon for proper handling of ANSI escape sequences on Windows, unpacking it somewhere on your drive and calling ansicon -i to install it permanently on the command prompt (if needed, you can uninstall ansicon by calling ansicon -u). Then, you have to edit the script rdfpro.cmd and change RDFPRO_ANSI_ENABLED=false to RDFPRO_ANSI_ENABLED=true.

Optional installation steps for all users. The following optional steps can be performed by all users (Linux/Mac/Windows) to improve RDFpro performances or ease of use:

  • Add the rdfpro directory to your PATH variable, or (on Mac/Linux) add a symlink to the rdfpro script in some directory already in your PATH (e.g., symlink /usr/bin/rdfpro), so that the rdfpro script can be called without specifying its full path.

  • To improve performances, it is advised to configure sort to use more memory and to compress temporary files, e.g., by setting property rdfpro.cmd.sort = sort -S 1024M --compress-program gzip (you can use a value larger than 1024M and pigz in place of gzip). Also make sure that you have enough space under your /tmp folder, or configure sort to use a specific folder for temporary files (option -T tmp_directory_path).

  • To improve performances, install the multi-threaded versions of gzip and bzip2, called pigz and pbzip2 These utilities are available also for Windows (for pigz see here and here, while pbzip2 should be compiled from sources on Windows). After their installation, you have to configure RDFpro to use them by setting properties rdfpro.cmd.gzip = path_to_pigz and rdfpro.cmd.bzip2 = path_to_pbzip2 (you can omit the full path if pigz and pbzip2 are already in your PATH).

  • If you wish to directly manipulate RDF files compressed with xz or lz4 with RDFpro, make sure that you have the corresponding utilities installed (on Windows, xz is available here and lz4 is available here). If not available on the PATH you have to manually enter the full path to their executable in file etc/ the Make sure you have the xz and 7za utilities

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Last Published: 2022/02/04.

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