[jira] [Comment Edited] (ATLAS-1768) Create common types for Open Metadata

["David Radley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ATLAS-1768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16089941#comment-16089941 ] 

David Radley edited comment on ATLAS-1768 at 7/17/17 3:19 PM:
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[~mandy_chessell] I am looking at the glossary model and I notice that in model 210-Glossary, the ExternalGlossaryLink has an atribute called source of type ExternalReference. Now that ExternalReference is an entity and not a structure, I suggest we change ExternalGlossaryLink  to subclass  ExternalReference and add the extra organization attribute.  

In model 220 LibraryCategoryReference is a relationship with an attribute called source of type  ExternalReference. We need to change this as relationshipDefs cannot have relationships. I suggest we explicitly add the attributes we need into this relationship. I notice the term version of this relationship is not consistent with this category one.   



was (Author: davidrad):
[~mandy_chessell] I am looking at the glossary model and I notice that in model 210-Glossary, the ExternalGlossaryLink has an atribute called source of type ExternalReference. Now that ExternalReference is an entity and not a structure, I suggest we change ExternalGlossaryLink  to subclass  ExternalReference and add the extra organization attribute.  

> Create common types for Open Metadata
> -------------------------------------
>
>                 Key: ATLAS-1768
>                 URL: https://issues.apache.org/jira/browse/ATLAS-1768
>             Project: Atlas
>          Issue Type: New Feature
>          Components:  atlas-core
>    Affects Versions: 0.9-incubating
>            Reporter: Mandy Chessell
>            Assignee: Mandy Chessell
>              Labels: OpenMetadata
>
> This JIRA describes a proposal for standard types for open metadata entities and relationships.  For example, glossaries, database definitions, rules, policies, ...
> The value of having standard definitions for metadata is to enable type safe APIs and business level UIs plus be able to exchange metadata between different instances of metadata repositories.
> The implementation of these common types is divided into 8 areas:
> * Area 0 - for extensions to Apache Atlas's base model
> * Area 1 - for definitions of the data-related assets we are governing and using
> * Area 2 - for a glossary of meanings and semantic relationships
> * Area 3 - for information about asset use, crowd-sourced definitions and collaboration around the data-related assets
> * Area 4 - for governance such as policies, rules and classifications
> * Area 5 - for reference models and reference data
> * Area 6 - for metadata discovery processes (see https://issues.apache.org/jira/browse/ATLAS-1748)
> * Area 7 - for lineage
> Adaptation and flexibility are key in metadata environments so these common definitions must be extensible - and we still need to support the ad hoc definition of new types in Atlas.
> Apache Atlas supports meta-types that are used in the definition of new types.  These are currently enumeration, struct, classification and entity.  JIRA https://issues.apache.org/jira/browse/ATLAS-1690 adds relationships to this list.  The open metadata models make use of all of these meta-types.  These are represented by sterotypes on the classes of the open metadata definitions.
> The Atlas wiki has the models as a set of linked pages which are probably the easiest way to view the models.
> Start here: https://cwiki.apache.org/confluence/display/ATLAS/Building+out+the+Apache+Atlas+Typesystem



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