Entity Extensibility Pattern

[BJ Freeman]

https://cwiki.apache.org/confluence/display/OFBTECH/General+Entity+Overview
I am confused about hasTable=
EntityType is used to describe an Entity. A given EntityType can inherit
features from a parent EntityType if one is specified in the
parentTypeId field of a given EntityType instance. If a table is
associated with a given EntityType instance that has the same name as
the entityTypeId field value then the hasTable field should have the
value 'Y', otherwise it should have the value 'N'. A description field
is provided for a short description of an EntityType instance.

Now I found
     <PartyRelationshipType description="" hasTable="Y" parentTypeId=""
partyRelationshipName="Employee" partyRelationshipTypeId="EMPLOYMENT"
roleTypeIdValidFrom="" roleTypeIdValidTo=""/>

but no other enteries for partyRelationshipName="Employee" or
partyRelationshipTypeId="EMPLOYMENT"

any clarification would appreciated.


=========================
BJ Freeman
http://bjfreeman.elance.com
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[Jacques Le Roux]

Hi BJ,

There is actually an Employment entity in HumanRes so the hasTable field must be "Y" in this case because
partyRelationshipTypeId="EMPLOYMENT" exists and there is an Employment entity.

Also note that at the end of the explanation there is this sentence: "There are variations on this pattern for certain entities, but
this description is generally applicable in this data model." I guess it's one of the "specific case" since there is no other
entities
prefixed by "PartyRelationship" (no PartyRelationshipAttribute which would be used in conjunction with PartyRelationshipTypeAttr to
actually *extent* PartyRelationship). In other word the Extensibilty pattern is not completly used here (or not at all?). This
section has always troubled my mind. I wonder if it's not because 2 concepts are mixed there. In other and simpler words you can use
an EntityType entity to describe an Entity without extending it (ie adding virutal colums to it by using the
EntityAttribute/EntityTypeAttr couple)

HTH

Jacques

From: "BJ Freeman" <[hidden email]>

> https://cwiki.apache.org/confluence/display/OFBTECH/General+Entity+Overview
> I am confused about hasTable=
> EntityType is used to describe an Entity. A given EntityType can inherit features from a parent EntityType if one is specified in
> the parentTypeId field of a given EntityType instance. If a table is associated with a given EntityType instance that has the same
> name as the entityTypeId field value then the hasTable field should have the value 'Y', otherwise it should have the value 'N'. A
> description field is provided for a short description of an EntityType instance.
>
> Now I found
>     <PartyRelationshipType description="" hasTable="Y" parentTypeId="" partyRelationshipName="Employee"
> partyRelationshipTypeId="EMPLOYMENT" roleTypeIdValidFrom="" roleTypeIdValidTo=""/>
>
> but no other enteries for partyRelationshipName="Employee" or
> partyRelationshipTypeId="EMPLOYMENT"
>
> any clarification would appreciated.
>
>
> =========================
> BJ Freeman
> http://bjfreeman.elance.com
> Strategic Power Office with Supplier Automation  <http://www.businessesnetwork.com/automation/viewforum.php?f=52>
> Specialtymarket.com  <http://www.specialtymarket.com/>
>
> Systems Integrator-- Glad to Assist
>
> Chat  Y! messenger: bjfr33man
> Linkedin <http://www.linkedin.com/profile?viewProfile=&key=1237480&locale=en_US&trk=tab_pro>
>

[BJ Freeman]

Thanks when I move the entityengine page to doc book will add this
explanation.



=========================
BJ Freeman
Strategic Power Office with Supplier Automation  <http://www.businessesnetwork.com/automation/viewforum.php?f=52>
Specialtymarket.com  <http://www.specialtymarket.com/>
Systems Integrator-- Glad to Assist

Chat  Y! messenger: bjfr33man
Jacques Le Roux sent the following on 12/5/2010 2:40 AM:

> Hi BJ,
>
> There is actually an Employment entity in HumanRes so the hasTable field
> must be "Y" in this case because
> partyRelationshipTypeId="EMPLOYMENT" exists and there is an Employment
> entity.
>
> Also note that at the end of the explanation there is this sentence:
> "There are variations on this pattern for certain entities, but
> this description is generally applicable in this data model." I guess
> it's one of the "specific case" since there is no other
> entities
> prefixed by "PartyRelationship" (no PartyRelationshipAttribute which
> would be used in conjunction with PartyRelationshipTypeAttr to
> actually *extent* PartyRelationship). In other word the Extensibilty
> pattern is not completly used here (or not at all?). This
> section has always troubled my mind. I wonder if it's not because 2
> concepts are mixed there. In other and simpler words you can use
> an EntityType entity to describe an Entity without extending it (ie
> adding virutal colums to it by using the EntityAttribute/EntityTypeAttr
> couple)
>
> HTH
>
> Jacques
>
> From: "BJ Freeman" <[hidden email]>
>> https://cwiki.apache.org/confluence/display/OFBTECH/General+Entity+Overview
>>
>> I am confused about hasTable=
>> EntityType is used to describe an Entity. A given EntityType can
>> inherit features from a parent EntityType if one is specified in
>> the parentTypeId field of a given EntityType instance. If a table is
>> associated with a given EntityType instance that has the same
>> name as the entityTypeId field value then the hasTable field should
>> have the value 'Y', otherwise it should have the value 'N'. A
>> description field is provided for a short description of an EntityType
>> instance.
>>
>> Now I found
>> <PartyRelationshipType description="" hasTable="Y" parentTypeId=""
>> partyRelationshipName="Employee"
>> partyRelationshipTypeId="EMPLOYMENT" roleTypeIdValidFrom=""
>> roleTypeIdValidTo=""/>
>>
>> but no other enteries for partyRelationshipName="Employee" or
>> partyRelationshipTypeId="EMPLOYMENT"
>>
>> any clarification would appreciated.
>>
>>
>> =========================
>> BJ Freeman
>> http://bjfreeman.elance.com
>> Strategic Power Office with Supplier Automation
>> <http://www.businessesnetwork.com/automation/viewforum.php?f=52>
>> Specialtymarket.com <http://www.specialtymarket.com/>
>>
>> Systems Integrator-- Glad to Assist
>>
>> Chat Y! messenger: bjfr33man
>> Linkedin
>> <http://www.linkedin.com/profile?viewProfile=&key=1237480&locale=en_US&trk=tab_pro>
>>
>>
>
>
>