compile fop 2.3 from source

Did not find any javadoc of fop 2.3. Tried to generate it from downloaded
source.
Doing a "mvn clean install" led to failures:

Downloaded from central:
https://repo.maven.apache.org/maven2/junit/junit/3.8.2/junit-3.8.2.jar (121
kB at 25 kB/s)
Downloaded from central:
https://repo.maven.apache.org/maven2/log4j/log4j/1.2.12/log4j-1.2.12.jar
(358 kB at 73 kB/s)
Downloaded from central:
https://repo.maven.apache.org/maven2/com/google/collections/google-collections/1.0/google-collections-1.0.jar
(640 kB at 128 kB/s)
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 3 source files to
E:\winEclipse\fop-2.3\fop-util\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR]
E:\winEclipse\fop-2.3\fop-util\src\main\java\org\apache\fop\util\XMLResourceBundle.java:[20]
error: cannot access org.apache.fop.util
[ERROR]   error accessing directory
E:\winEclipse\fop-2.3\fop-util\src\main\javajava.nio.file.InvalidPathException:
Illegal char <:> at index 42:
org\apache\fop\util\XMLResourceBundle.java:Zone.Identifier
E:\winEclipse\fop-2.3\fop-util\src\main\java\org\apache\fop\util\text\AdvancedMessageFormat.java:[20]
error: cannot access org.apache.fop.util.text
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO]
------------------------------------------------------------------------
[INFO] Reactor Summary for Apache FOP Parent 2.3:
[INFO]
[INFO] Apache FOP Parent .................................. SUCCESS [ 13.520
s]
[INFO] Apache FOP Utilities ............................... FAILURE [ 54.544
s]
[INFO] Apache FOP Events .................................. SKIPPED
[INFO] Apache FOP Core .................................... SKIPPED
[INFO] Apache FOP All-In-One .............................. SKIPPED
[INFO] Apache FOP Sandbox ................................. SKIPPED
[INFO] Apache FOP Servlet ................................. SKIPPED
[INFO] Apache FOP Transcoder .............................. SKIPPED
[INFO] Apache FOP Transcoder All-In-One ................... SKIPPED
[INFO]
------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO]
------------------------------------------------------------------------
[INFO] Total time:  01:08 min
[INFO] Finished at: 2019-02-19T23:58:13+01:00
[INFO]
------------------------------------------------------------------------
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile)
on project fop-util: Compilation failure: Compilation failure:
[ERROR]
E:\winEclipse\fop-2.3\fop-util\src\main\java\org\apache\fop\util\XMLResourceBundle.java:[20]
error: cannot access org.apache.fop.util
[ERROR]   error accessing directory
E:\winEclipse\fop-2.3\fop-util\src\main\javajava.nio.file.InvalidPathException:
Illegal char <:> at index 42:
org\apache\fop\util\XMLResourceBundle.java:Zone.Identifier
[ERROR]
E:\winEclipse\fop-2.3\fop-util\src\main\java\org\apache\fop\util\text\AdvancedMessageFormat.java:[20]
error: cannot access org.apache.fop.util.text
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please
read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the
command
[ERROR]   mvn <goals> -rf :fop-util

E:\winEclipse\fop-2.3>



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