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https://issues.apache.org/jira/browse/ATLAS-1344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15764607#comment-15764607
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Madhan Neethiraj commented on ATLAS-1344:
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[~davidrad] with enhancements in ATLAS-1171,
org.apache.atlas.typesystem.types.AttributeDefinition.java is replaced by
org.apache.atlas.model.typedef.AtlasStructDef.AtlasAttributeDef.
AtlasAttributeDef supports the notion of "constraints" - which can used to
model parent-child relationships. Currently, "constraints" is used to replace
existing fields "isComposite" and "reverseAttributeName" with "foreignKey" and
"mappedFromRef" constraints. addons/models/0030-hive_model.json is a good
reference for such usage.
Please review and let me know if you have any comments/questions.
> Allow types to be created that support parent child hierarchies.
> ----------------------------------------------------------------
>
> Key: ATLAS-1344
> URL: https://issues.apache.org/jira/browse/ATLAS-1344
> Project: Atlas
> Issue Type: Improvement
> Reporter: David Radley
> Assignee: David Radley
>
> enhance the Type system to allow entities to be created in parent child
> hierarchies.
> I notice that AttributeDefinition currently only support COLLECTION, SET ,
> OPTIONAL and REQUIRED. There is no collection with a lower bound of 0- which
> would be required for a parent child type relationship.
> Also it seems to me that it would be ideal to create an attribute with the
> guid of the parent / child and then derive the other one from the edge. I may
> have misunderstood but reverseAttributeName seems to use the name of the
> attribute not the guid.
> I suggest that iscomposite true and false is supported.
> When we have this in place, we could use this mechanism for Glossary
> Categories
>
>
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