EBI Groups Computational Neurobiology TEDDY

Announcement of the release rel-2011-03-10

Announcement of the release `rel-2011-03-10`

We are please to announce a new release of the Terminology for the Description of Dynamics (TEDDY). The main changes are summarised below. You can explore the ontology via BioPortal.

You can post comments or questions on the discussion list. For term requests please use the term tracker.

News in TEDDY rel-2011-03-10

0. Style more OBOish

We changed all term names to lowercase. We changed the style of all definitions. Instead of the old scheme

"A <termname> is a..."

we now use the more common form

"a...".

1. Base URI

We changed the base URI from

http://www.ebi.ac.uk/compneur-srv/teddy.owl

http://biomodels.net/teddy/ .

2. Stability sub-branch

After a long discussion we decided to give up the sub-branch of 'behavioural characteristics' for stability terms. This terms were used to characterise temporal behaviours wrt. to their stability, e.g.

'stable node' hasStability 'stable'.

There are two problems with this: 1) Terms like "stable" aren't nouns. Thus they cannot represent classes of objects. 2) We also need corresponding temporal behaviours, e.g. 'stable behaviour'. It turns out that the stability branch doesn't provide useful information in addition to the information already in the corresponding temporal behaviour terms. Because of that, we removed the stability branch and the hasStability relation. The terms under 'temporal behaviours' were adapted accordingly.

3. Temporal behaviours

The temporal behaviour branch was revised. We now have a subdivision in two dimensions:

branching by period/repeatingness
- 'fixed point' (period=0)
- 'periodic behaviour' (0
- 'non-periodic behaviour' (period=infinity)
branching by relations to neighbour behaviours
- 'liapunov stable behaviour' (other behaviours remain near to it) -- this serves as a supperclass for 'neutral behaviour', e.g. 'neutrally stable fixed point', 'non-isolated cycle'
- 'limit behaviour' (other behaviours converge to or from it), e.g. 'stable behaviour', 'half-stable behaviour', 'unstable behaviour'
- 'asymptotic behaviour' (converge to or from a 'limit behaviour')

4. Browsing

We do not provide OWLdoc documentation of TEDDY anymore. You can browse the ontology and find all the information via BioPortal.

You will find all changes in the ChangeLog.

Announcement of the release rel-2011-03-10