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https://issues.apache.org/jira/browse/ATLAS-1955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16130275#comment-16130275
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David Radley commented on ATLAS-1955:
-------------------------------------

[~ivarea]. I think we want reusable validation one email type all can use. 
Atlas will then ship some of these types that can be used by the shipped models 
- I am thinking of url and image being very useful. We could have new attribute 
types to police valid names for hive tables and the like. I think option 2 or a 
variant will be very powerful. 

> Validation for Attributes
> -------------------------
>
>                 Key: ATLAS-1955
>                 URL: https://issues.apache.org/jira/browse/ATLAS-1955
>             Project: Atlas
>          Issue Type: New Feature
>          Components:  atlas-core
>    Affects Versions: 0.9-incubating
>            Reporter: Israel Varea
>            Assignee: Richard Ding
>             Fix For: 0.9-incubating
>
>
> It would be very nice that Atlas model could contain a way to represent 
> attribute validation. 
> A simple example is that we would like to model a Person, with attributes 
> Name, Email and Country. Now we would like to specify that Email has to 
> follow a specific regular expression, so it would be nice if we could set 
> Email -> hasValidation -> EmailRegex, with EmailRegex having:
> Name: Email Regular Expresion
> Expression: /[0-9a-z]+@[0-9a-z]+.[0-9a-z]+/
> For more complex types of validation, e.g. checking card number validity, it 
> could be added some external validator function/service.
> Name: Credit Card Number Validator
> Validator: org.apache.atlas.validators.creditcard or 
> https://host:port/creditCardValidator
> For validations from a reference table, for example a country name, it could 
> be:
> Name: Country Name Ref Validator
> Reference Column: <country_name_column>
> where <country_name_column> would be an instance of type Hive_Column or 
> HBase_Column.
> Since this is a kind of Standarization, it could be placed in [Area 
> 5|https://cwiki.apache.org/confluence/display/ATLAS/Area+5+-+Standards].
> A similar approach is followed in software 
> [Kylo|https://github.com/Teradata/kylo/tree/master/integrations/spark/spark-validate-cleanse]



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