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Intent of DDI-CDI
DDI - Cross Domain Integration (DDI-CDI) is a specification aimed at hel=
ping implementers integrate data across domain and institutional boundaries=
. Modern research increasingly involves large amounts of data, much of whic=
h comes from non-traditional sources (sensors, big data, social media, etc.=
) and often from other domains. DDI-CDI focuses on a uniform approach to de=
scribing a range of needed data formats (traditional wide/rectangular data,=
long [event] data, multi-dimensional data, and NoSQL/key-value data) which=
allows them to be connected and understood to support transformation and p=
rocessing for integrated use.
Further, the aspects of data provenance related to data processing are cove=
red, to document the ways in which data are sourced - this is a key aspect =
of data description when working with data from unfamiliar domains, which m=
ay be the product of an unfamiliar production lifecycle. DDI-CDI is aligned=
with other DDI specifications (DDI-C, DDI-L) to support integration of ext=
ernal data in systems which use DDI. It is explicitly designed to work with=
many popular generic technology standards such as PROV-O, BPMN, DCAT, SDMX=
, DataCube, SSN/SOSA and Schema.org to allow for easy integration into syst=
ems which support them.
DDI-CDI offers an extension to the suite of DDI work products which will he=
lp those in the SBE domains and outside of them integrate the expanding ran=
ge of data required by today's research.
Download and Overview of Content for Review
All materials for the initial round of public review for the DDI Cross D= omain Integration (DDI =E2=80=93 CDI) specification can be found in this do= wnload.
CLICK HERE to download all content for review.
It is recommended to unzip the downloaded file into a folder with a short p=
ath name (like "c:\ddi") otherwise some Windows systems might complain abou=
t too long path names.
Access all individual content documents from an index page.
It is recommended that access to the field level documentation for the M= odel be through the link from the index page. It requires that Javascr= ipt be supported by the browser used to view it. This can cause problems fo= r local files with some browsers=E2=80=99 security settings.
This folder contains four documents, describing the DDI =E2=80=93 Cross =
Domain Integration specification at a high level. These include an introduc=
tory document, a document giving a more detailed description of the model (=
Foundational Metadata, Data Description, and Process), a document outlining=
the architecture and approaches to modelling and alignment with other stan=
dards/technical specifications, and a set of documentation giving more comp=
lex examples and use cases.
In the Supporting Documents sub-folder are documents covering the subset of=
UML used in the DDI =E2=80=93 CDI model.
The following primary documents are also available through the following= links:
This folder contains two versions of the model in Canonical XMI (the XML= interchange format for UML models), one using unique association names and= one as documented in the specification documents (some UML tools demand th= is uniqueness, others do not). There is also a copy of the Sparx Enterprise= Architect file used by the development team, for those reviewers who use t= his tool. All diagrams in the detailed model are included in the EA file.= p>
In the Field-Level Documentation sub-folder is the HTML= field-level documentation for every construct in the model. To view online= version click here.
In the Supporting Documents sub-folder is a file contai= ning all of the diagrams used on the model, which may be more suitable for = reading (=E2=80=9Czooming in=E2=80=9D) and display than those found in-line= in other documents.
There is only one syntax representation included in the public review pa= ckage: Extensible Markup Language (XML). This can be found on the X= ML Syntax Representation sub-folder.
This folder contains the XML Schema definition file for the XML represen= tation of DDI =E2=80=93 CDI, as well as the required =E2=80=9Cxml.xsd=E2=80= =9D file. Release notes are included.
In the Examples sub-folder are the three XML examples c= reated in support of the examples and use cases document. In the HT= ML XML Schema Documentation sub-folder is a zipped archive contain= ing the field-level documentation for the XML Schema. To view online versio= n click here.
This folder contains other examples mentioned in the examples and use ca= ses document.
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