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JHOVE - JSTOR/Harvard Object Validation Environment Copyright 2003-2011 by JSTOR and the President and Fellows of Harvard College JHOVE is made available under the GNU Lesser General Public License (LGPL; see the file LICENSE for details) Rev. 1.6, 2011-01-04 JHOVE (the JSTOR/Harvard Object Validation Environment, pronounced "jhove") is an extensible software framework for performing format identification, validation, and characterization of digital objects. o Format identification is the process of determining the format to which a digital object conforms: "I have a digital object; what format is it?" o Format validation is the process of determining the level of compliance of a digital object to the specification for its purported format: "I have an object purportedly of format F; is it?" o Format characterization is the process of determing the format-specific significant properties of an object of a given format: "I have an object of format F; what are its salient properties?" These actions are frequently necessary during routine operation of digital repositories and for digital preservation activities. The output from JHOVE is controlled by output handlers. JHOVE uses an extensible plug-in architecture; it can be configured at the time of its invocation to include whatever specific format modules and output handlers that are desired. The initial release of JHOVE includes modules for arbitrary byte streams, ASCII and UTF-8 encoded text, AIFF and WAVE audio, GIF, JPEG, JPEG 2000, TIFF, and PDF; and text and XML output handlers. The JHOVE project is a collaboration of JSTOR and the Harvard University Library. Development of JHOVE was funded in part by the Andrew W. Mellon Foundation. JHOVE is made available under the GNU Lesser General Public License (LGPL; see the file LICENSE for details). REQUIREMENTS 1. Java J2SE 1.4 (JHOVE was originally implemented using the Sun J2SE SDK 1.4.1 and has been tested to work with 1.4.2 <http://java.sun.com/j2se/1.4.2/>) 2. If you would like to compile the JHOVE source code, then Apache Ant, a Java-based build tool <http://ant.apache.org/> is necessary. Note that the JAVA_HOME environment variable must be set appropriately for Ant to work properly. (JHOVE was implemented and tested using Ant 1.5.1.) DISTRIBUTION The JHOVE distribution package includes: jhove/ # JHOVE home directory COPYING # GNU Lesser General Public License LICENSE # JHOVE license information README RELEASENOTES # JHOVE release notes bin/ jhove.jar # JHOVE API package jhove-handler.jar # Standard output handler package jhove-module.jar # Standard module package JhoveApp.jar # JHOVE command line application JhoveView.jar # JHOVE with Swing GUI front-end build.xml # Ant configuration file classes/ build.xml # Ant configuration file edu/ ... # JHOVE API packages ADump.* # AIFF dump utility class GDump.* # GIF dump utility class Jhove.* # JHOVE main class JDump.* # JPEG dump utility class J2Dump.* # JPEG 2000 dump utility class PDump.* # PDF dump utility class TDump.* # TIFF dump utility class UserHome.* # user.home property utility class WDump.* # WAVE dump utility class conf/ jhove.conf # JHOVE configuration file jhove.xsd # JHOVE output schema jhoveConfig.xsd # JHOVE configuration file schema doc/ *.html # API documentation ... examples/ # Sample files ascii/ ... gif/ ... jpeg/ ... jpeg2000/ ... pdf/ ... tiff/ ... utf-8/ ... adump* # AIFF dump Bourne shell driver adump.bat* # AIFF dump DOS shell driver script gdump* # GIF dump Bourne shell driver gdump.bat* # GIF dump DOS shell driver script jdump* # JPEG dump Bourne shell driver jdump.bat* # JPEG dump DOS shell driver script j2dump* # JPEG 2000 dump Bourne shell driver j2dump.bat* # JPEG 2000 dump DOS shell driver jhove.tmpl* # Template for JHOVE Bourne shell driver script jhove_bat.tmpl* # Template for JHOVE DOS shell driver script pdump* # PDF dump Bourne shell driver pdump.bat* # PDF dump DOS shell driver script tdump* # TIFF dump Bourne shell driver tdump.bat* # TIFF dump DOS shell driver script userhome* # user.home Bourne shell driver userhome.bat* # user.home DOS shell driver script wdump* # WAVE dump Bourne shell driver wdump.bat* # WAVE dump DOS shell driver script INSTALLATION Edit the configuration file, jhove/conf/jhove.conf, and set the absolute pathname of the JHOVE home directory and the temporary directory (in which temporary files are created): <jhoveHome>jhove-home-directory</jhoveHome> <tempDirectory>temporary-directory</tempDirectory> The JHOVE home directory is the top-most directory in the distribution TAR or ZIP file. On Unix systems, "/var/tmp" is an appropriate temporary directory; on Windows, "C:\Temp". For example, if the distribution TAR file is disaggregated on a Unix system in the directory "/users/stephen/ projects", then the configuration file should read: <jhoveHome>/users/stephen/projects/jhove</jhoveHome> <tempDirectory>/var/tmp</jhoveHome> In the JHOVE home directory, copy the JHOVE Bourne shell driver script template, "jhove.tmpl", to "jhove" (or the equivalent Windows shell script, "jhove_bat.tmpl" to "jhove.bat"), and set the JHOVE home directory, Java home directory, and Java interpreter: JHOVE_HOME=jhove-home-directory JAVA_HOME=java-home-directory JAVA=java-interpreter The JAVA_HOME property should provide the absolute pathname of the Java runtime or SDK installation; JAVA should provide the absolute pathname of the Java interpreter. For example: JHOVE_HOME=/users/stephen/projects/jhove JAVA_HOME=/usr/local/j2re1.4.1_02 JAVA=$JAVA_HOME/bin/java In the DOS shell driver script, jhove.bat, the equivalent three variables are: SET JHOVE_HOME=jhove-home-directory SET JAVA_HOME=java-home-directory SET JAVA=%JAVA_HOME%\bin\java For example: SET JHOVE_HOME="C:\Program Files\jhove" SET JAVA_HOME="C:\Program Files\java\j2re1.4.1_02" SET JAVA=%JAVA_HOME%\bin\java The quotation marks are necessary because of the embedded space characters. On Windows platforms it may also be necessary to add the Java bin subdirectory to the System PATH environment variable: PATH=C:\Program Files\java\j2re1.4.1_02\bin;... (For information on setting a Windows environment variable, consult your local documentation or system administrator.) USAGE java Jhove [-c config] [-m module] [-h handler] [-e encoding] [-H handler] [-o output] [-x saxclass] [-t tempdir] [-b bufsize] [-l loglevel] [[-krs] dir-file-or-uri [...]] where -c config Configuration file pathname -m module Module name -h handler Output handler name (defaults to TEXT) -e encoding Character encoding used by output handler (defaults to UTF-8) -H handler About handler name -o output Output file pathname (defaults to standard output) -x saxclass SAX parser class (defaults to J2SE 1.4 default) -t tempdir Temporary directory in which to create temporary files -b bufsize Buffer size for buffered I/O (defaults to J2SE 1.4 default) -l loglevel Logging level -k Calculate CRC32, MD5, and SHA-1 checksums -r Display raw data flags, not textual equivalents -s Format identification based on internal signatures only dir-file-or-uri Directory or file pathname or URI of formated content stream All named modules and output handlers must be found on the Java CLASSPATH at the time of invocation. The JHOVE driver script, jhove/jhove, automatically sets the CLASSPATH and invokes the Jhove main class: jhove [-c config] [-m module] [-h handler] [-e encoding] [-H handler] [-o output] [-x saxclass] [-t tempdir] [-b bufsize] [-l loglevel] [[-krs] dir-file-or-uri [...]] The following additional programs are available, primarily for testing and debugging purposes. They display a minimally processed, human-readable version of the contents of AIFF, GIF, JPEG, JPEG 2000, PDF, TIFF, and WAVE files: java ADump aiff-file java GDump gif-file java JDump jpeg-file java J2Dump jpeg2000-file java PDump pdf-file java TDump tiff-file java WDump wave-file For convenience, the following driver scripts are also available: adump aiff-file gdump gif-file jdump jpeg-file j2dump jpeg2000-file pdump pdf-file tdump tiff-file wdump wave-file The JHOVE Swing-based GUI interface can be invoked from a command shell from the jhove/bin sub-directory: java -jar JhoveView.jar -c <configFile> where <configFile> is the pathname of the JHOVE configuration file.
Source: README, updated 2012-08-12