Need of dm_document !!

Dear Experts ,

We know that dm_document does not have any attribute of its own . It inherits all the attributes from the dm_sysObject and Persistent Object.

And, dm_document has no dm_document_s and dm_document_r tables in the database.

We create our custom object types by extending dm_document. Can't we directly extend the dm_sysobject ?

So, what is the significance of the dm_document subtype ?

Thanks & Regards

Saswata Mandal.

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Comments

andrei.paraschiv

Hello,

dm_document has a table called "dm_document_s" with the following columns:

- r_object_id

- i_partition

dm_document is just a child for dm_sysobject, to help you creating virtual documents, have different formats associated to objects...

Andrei

lastnitescurry

please do feel free to make an effor yourself...

http://www.catb.org/~esr/faqs/smart-questions.html

We create our custom object types by extending dm_document. Can't we directly extend the dm_sysobject ?

try it and report back your findings to us.

then we will make an effort to answer your question

So, what is the significance of the dm_document subtype ?

Imran_Yusubov

Hi,

Can't we directly extend the dm_sysobject ? Yes , we can.

So, what is the significance of the dm_document subtype ?

In my opinion dm_document does not have any significance in data model.I think the significance of the dm_document is on the client applications such as webtop/da/taskspace.Most of this applications designed based on dm_document.For example if you create a new type extend from dm_sysobject you can't find it in create new document component's type selection list.Because this component uses dm_document as a base type so your types extend from dm_sysobject will not be available in the selection list.Of course you can change it if you want.

Pump

In short the significance is that many things are sys objects folders and documents

By inheriting directly from dm_sysobject even though you can there are other distinctions in queries and reports you get down the road by following the recommendation.