Re: [BP - MET] - Best Practices - Guidance on the Provision of Metadata

Hi Laufer,

Thanks for sharing your thoughts!

I am not sure if we should consider data catalogues as data brokers. A data
catalogue is just a tool that helps data publication and data access, and
both data providers and data consumers may use this tool.

Concerning the classification of metadata, I suggest to think in terms of
datasets and distributions, as described in DCAT and proposed by Makx.

Since you mentioned Open Data Ecosystem, I'm sending a paper that I wrote
together with a colleague about this subject. The paper considers Open Data
as a Service, but it also describes and idea about Open Data Ecosystem.

kind regards,
Bernadette




2014-05-15 11:35 GMT-03:00 Laufer <laufer@globo.com>:

>  Hi Bernadette, Carlos, Makx, all DWBP members,
>
>
>
> I created a page on the wiki, "Best Practices – Guidance on the Provision
> of Metadata", where we can put the information about this topic. I took the
> liberty to define a prefix in the subject of the e-mails related to these
> discussions: [BP- MET].
>
>
>
> I would like to expose some thoughts that I think are related to the data
> on the web ecosystem. I see a kind of data architecture that has three big
> roles: a data Publisher, a data Consumer and a data Broker. The Broker is
> the one that has information that can be used by the Consumer to find data
> published by the Publisher.
>
>
>
> As an example of Brokers we can think about implementations of CKAN, used
> by data.gov, dados.gov.br, etc. CKAN has metadata (provided by
> Publishers) that are useful for Consumers to find data. CKAN is a registry
> and can also be a repository for the data to be consumed. Almost all use
> cases of DWBP WG are examples of Brokers.
>
>
>
> At the same time, data published in CKAN implementations can have multiple
> formats, as CSV, for example. Once a Consumer chooses some data to use from
> a Publisher, she needs another kind of metadata to understand how to access
> the data and its semantics.
>
>
>
> I propose to create categories and types of metadata. I see two
> categories: metadata for search and metadata for use. Each of these
> categories would have types of metadata. For example:
>
>
>
> Metadata Types for Search
>
> Human Content Description (free text)
>
> Machine Content Description (vocabularies)
>
> Provenance
>
> License
>
> Revenue
>
> Credentials
>
> Quality / Metrics
>
> Release Schedule
>
> Data Format
>
> Data Access
>
>
>
> Metadata Types for Use
>
> URI Design Principles
>
> Machine Access to Data
>
> API specification
>
> Format Specification
>
>
>
> The Brokers itself have another kind of metadata about its own information.
>
>
> Maybe in the future a Consumer will search for data no more in these
> Brokers (with its catalogues) but they will use search engines that could
> obtain the metadata (both the search and the use) using its crawlers. But
> now, we have this heterogeneous world of data that is one of the
> characteristic of the web since its beginning.
>
>
>
> Contributions of all members of the DWBP WG will be appreciated.
>
>
>
> Best Regards,
>
> Laufer
>
> --
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>



-- 
Bernadette Farias Lóscio
Centro de Informática
Universidade Federal de Pernambuco - UFPE, Brazil
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