# Http://www.loc.gov/mods/v3 - Namespace

**URL:** <https://discourse.jabref.org/t/http-www-loc-gov-mods-v3-namespace/735>\
**Category:** Help\
**Created:** [August 1, 2017, 8:44pm UTC](https://discourse.jabref.org/t/http-www-loc-gov-mods-v3-namespace/735 "2017-08-01T20:44:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![pnutPowell](https://avatars.discourse-cdn.com/v4/letter/p/ce73a5/32.png) [@pnutPowell](https://discourse.jabref.org/u/pnutPowell)\
**Post date:** [August 1, 2017, 8:44pm UTC](https://discourse.jabref.org/t/http-www-loc-gov-mods-v3-namespace/735/1 "2017-08-01T20:44:15Z")

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[http://www.loc.gov/mods/v3](http://www.loc.gov/mods/v3)

Hello!  
I’m a coding newbie and am trying to get some experience. I love this program and would like to help, if I can. I’m running into a problem with classes in the importer and exporter packages not being able to locate the fileformat.mods classes. I located the class /JabRef/src/main/java/org/jabref/logic/importer/fileformat/mods/package-info.java and tried to figure out what to do with that information, but I’m stumped! Can you please let me know? I have the application running fine on my desktop, including opening the test files, so I’m not sure why these few classes won’t compile in Eclipse.  
Thanks for any help!  
-Mary

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**Author:** ![matthiasgeiger](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.jabref.org/matthiasgeiger/32/7_2.png) [@matthiasgeiger](https://discourse.jabref.org/u/matthiasgeiger)\
**Post date:** [August 2, 2017, 6:58am UTC](https://discourse.jabref.org/t/http-www-loc-gov-mods-v3-namespace/735/2 "2017-08-02T06:58:34Z")

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Hi Mary!  
Thanks for your interest in contributing some code to JabRef! That sounds great!

Regarding your problem: We are using the build system **gradle** that downloads all necessary libraries and is also able to create preconfigured eclipse projects for you.

To build JabRef from source you can execute the so called _gradle wrapper_ by the command `gradlew build` in the root path of the downloaded JabRef repository. Then everything is downloaded, compiled and built automatically. To create a eclipse project just run `gradlew eclipse`. More on this topic [can be found here.](https://github.com/JabRef/jabref/wiki/Guidelines-for-setting-up-a-local-workspace)

If you are looking for some tasks checkout the Issue tracker at GitHub - especially those issues tagged with “beginner” might be a good start: [https://github.com/JabRef/jabref/issues?q=is%3Aopen+is%3Aissue+label%3Abeginner](https://github.com/JabRef/jabref/issues?q=is%3Aopen+is%3Aissue+label%3Abeginner)

To get newbies started we also have a Contribution guide here: [https://github.com/JabRef/jabref/blob/master/CONTRIBUTING.md](https://github.com/JabRef/jabref/blob/master/CONTRIBUTING.md)  
And there is also a Wiki with some more information: [https://github.com/JabRef/jabref/wiki](https://github.com/JabRef/jabref/wiki)

Don’t hesitate to ask if you need further assistance!

Best regards,  
Matthias