Thank you, Wolfgang! This makes sense to me.

The criteria for what is a period have to be decided by the experts. Yet, I 
think it is pretty clear that the Renaissance Augustus is a different period 
from the one in antiquity. Connected, but different. 

Regards,

Øyvind

On 6. jan. 2016, at 16:06, Wolfgang Schmidle wrote:

> Co-author here. Yes, we use [2] as evidence for [1], and if new evidence is 
> unearthed, the "restricted" statement may turn out to be false. 
> 
> The "closed world assumption" was only meant as an analogy. We do not argue 
> that a "Restriction" statement in the sense of a bounding box can be inferred 
> from the given "appears in" and "typical for" statements. (Maybe one should 
> also distinguish between the knowledge of the archaeologist and the — 
> possibly incomplete — list of actual "appears in" and "typical for" 
> statements.) Instead, it probably needs to be an explicit new statement, and 
> the inferred statement in Figure 3 should probably have a different name that 
> doesn't suggest anything but an inferred statement.
> 
> The point of the Restriction being a timespan rather than a period was, I 
> think, that the sum of periods may not automatically be a period itself. In 
> particular, it may not be identical to the "production of the Paukenfibel" 
> period. However, in Figure 3 we assume that there is at least no temporal gap 
> inbetween. And timespan means more or less the same as spacetime volume here 
> since the area in the example is always the same.
> 
> By the way, we have a similar problem in our gazetteer, where we need to 
> express the fact that a given region is part of the union of three other 
> regions. 
> 
> Best,
> Wolfgang
> 
> 
>> Am 06.01.2016 um 13:42 schrieb Øyvind Eide <lis...@oeide.no>:
>> 
>> Dear all,
>> 
>> This was an interesting read. I have a question:
>> 
>> I do not understand the logic of the last paragraph in page 2. First they 
>> talk about 
>> 
>> [1] “a specific time period in which and only in which objects of a given 
>> type have been created” 
>> 
>> and then they go on to talk about 
>> 
>> [2] no finds from other periods. 
>> 
>> [2] is much weaker than [1] but is seems to me that [2] is still used as 
>> evidence for [1]. I do not argue that is wrong to use it as evidence (there 
>> are never proofs in heritage based research of this kind) but I fail to see 
>> how it can be seen as a closed world assumption — that is pretty strong. 
>> 
>> I think it is a good choice to model it as an implicit restriction, though; 
>> the modelling looks fine. It is more the use of “closed world” I wonder 
>> about.
>> 
>> 
>> As for the choice between modelling of periods as timespans or periods I 
>> think this feeds well into the discussion we have on space-time modelling 
>> and this document will be useful for the discussions in Prato.
>> 
>> Regards,
>> 
>> Øyvind
>> 
>> 28. des. 2015 kl. 19:53 skrev martin <mar...@ics.forth.gr>:
>> 
>>> Dear All,
>>> 
>>> I wish you all a Happy New Year!
>>> 
>>> Please see this document to discuss properties of E55 Type
>>> for archaeological reasoning:
>>> http://www.cidoc-crm.org/docs/E55-Type-Relations.pdf
>>> 
>>> Best,
>>> 
>>> martin
>>> 
>>> -- 
>>> 
>>> --------------------------------------------------------------
>>> Dr. Martin Doerr              |  Vox:+30(2810)391625        |
>>> Research Director             |  Fax:+30(2810)391638        |
>>>                               |  Email: 
>>> mar...@ics.forth.gr
>>> |
>>>                                                             |        
>>>               Center for Cultural Informatics               |
>>>               Information Systems Laboratory                |
>>>                Institute of Computer Science                |
>>>   Foundation for Research and Technology - Hellas (FORTH)   |
>>>                                                             |
>>>               N.Plastira 100, Vassilika Vouton,             |
>>>                GR70013 Heraklion,Crete,Greece               |
>>>                                                             |
>>>             Web-site: 
>>> http://www.ics.forth.gr/isl
>>>           |
>>> --------------------------------------------------------------
>>> 
>>> 
>>> _______________________________________________
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