Common Logical Data Model: Basis for Global ITS Innovation
but charges for attendance at conferences
where many decisions are made. The
bottom line is that there is an administrative
cost
to
managing
the
standards
development process, and money has to
come from somewhere to make this happen.
process to develop the vocabulary which is
essentially the conceptual data model
discussed above.
ISO/TC 204 is also in the process of working
with ISO central to start a parallel project for
the logical data model on the basis that a
logical data model is still essentially a
vocabulary document, just one that is
primarily
intended
for
computer
programming rather than for human
language.
However, there are some limited exceptions
to this model as follows:
•
•
While ISO charges for its standards, it
does publish terms and definitions
online
for
free
at
https://www.iso.org/obp while still
allowing for free participation in
developing such standards. 40
Some online tools (i.e., Github) offer
free accounts to not-for-profit
entities, and some (mostly) informal
groups 28,29 have adopted the use of
such tools as a way to minimize
administrative costs to the point
where free participation in the
development of a standard and free
distribution of the standard is
possible.
M ODEL F ORMATS
The expectation is that, once approved, the
logical data model will be established under
the
same
Github
account
(https://github.com/ISO-TC204/) with its
own project identifier and use the same
basic process being used for the current ISO
14812 project. This project uses Sparx
Enterprise Architect as the main
development tool for developing and
diagramming the model. This content is then
uploaded to Github in the following formats:
•
ISO/TC 204 is in the process of combining
these two exception conditions to gain the
benefit of an official ISO deliverable under a
free and open process. It is already
developing an ITS vocabulary (ISO 14812)
using a public Github project (found at
https://github.com/ISO-TC204/iso14812). 41
As this is still under development, most of
the content is currently under the
development branch of the model; but this
allows a completely open and transparent
•
•
Native EAP file: This is the native
format for Sparx Enterprise Architect.
XMI file: This is the major open
format for exchanging UML models
across different software tools. This
is generated directly from the model
using a built-in software feature.
XML file: This is a simple XML file that
lists each term with its different
attributes; it is primarily intended to
serve as an easy way for a human
40 ISO Online Browsing Platform, https://www.iso.org/obp
41 ISO 14812 Intelligent Transport Systems – Vocabulary development platform. https://github.com/ISO-TC204/iso14812
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March 2020