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From "Stefhan van Helvoirt (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ATLAS-1768) Create common types for Open Metadata
Date Wed, 31 May 2017 09:41:04 GMT

    [ https://issues.apache.org/jira/browse/ATLAS-1768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16030904#comment-16030904
] 

Stefhan van Helvoirt commented on ATLAS-1768:
---------------------------------------------

Hi [~mandy_chessell],

Could you explain why there is a need or benefit to have 'Taxonomy' classification in 0210
Glossary?
Also the definition: "Taxonomy - This is a glossary where the terms have been organized into
a category hierarchy that reflects their meaning or use." I would say that with a Taxonomy
the terms are organized in a term type hierarchy not a category hierarchy. 


It is explicitly mentioned that categories can be linked across glossaries, i can't seem to
find the same mentioned for terms and their term2term relations. 



> 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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