<p>I'm trying to locate an open source business rules engine that has a decent interface for building the rules.</p>

<p>OR at least one that works well on the .Net platform and has been updated sometime in the past 12 months. </p>

<p>Thanks,</p>

[{'answer_id': 21818, 'author': 'Kevin Dente', 'author_id': 9, 'author_profile': 'https://Stackoverflow.com/users/9', 'pm_score': 4, 'selected': True, 'text': '<p>NxBRE is one option. </p>\n\n<p><a href="http://sourceforge.net/projects/nxbre/#item3rd-5" rel="noreferrer">http://sourceforge.net/projects/nxbre/#item3rd-5</a></p>\n'}, {'answer_id': 540838, 'author': 'Rinat Abdullin', 'author_id': 47366, 'author_profile': 'https://Stackoverflow.com/users/47366', 'pm_score': 1, 'selected': False, 'text': '<p><a href="http://abdullin.com/journal/2008/11/23/net-application-block-for-validation-and-business-rules.html" rel="nofollow noreferrer">.NET Application Block for Validation and Business Rules</a></p>\n'}, {'answer_id': 2009423, 'author': 'Sentient', 'author_id': 59398, 'author_profile': 'https://Stackoverflow.com/users/59398', 'pm_score': 1, 'selected': False, 'text': '<p>You can use Reaction RuleML. The Rule Manager from Acumen Business has an adapter for business users to generate a valid <a href="http://2007.ruleml.org/docs/Acumen%20Business%20-%20RuleML.pdf" rel="nofollow noreferrer">RuleML document</a></p>\n'}, {'answer_id': 5200632, 'author': 'NotMe', 'author_id': 2424, 'author_profile': 'https://Stackoverflow.com/users/2424', 'pm_score': 0, 'selected': False, 'text': '<p>I\'m going to throw one more piece of software I ran across: <a href="http://ncalc.codeplex.com/" rel="nofollow">ncalc</a>.</p>\n\n<p>It\'s not exactly a "rules" engine; but it does do dynamic calculations where you can give it the expression to evaluate and all of the variables necessary.   This was pretty much exactly all I needed for the app I was working on.</p>\n\n<p>For a simple engine it works just fine.  As far as an interface, it wasn\'t that complicated to build a few pages to let people type in the expressions.</p>\n\n<p>For more complicated things, NxBRE is a better option; as @Kevin Dente answered above.</p>\n'}]
['https://Stackoverflow.com/questions/21766', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/2424/']