Evidence for metalworking associated with hearths

Find> Find Notes = Metal
Returned 100+ results: 100+ RRAD, 100+ LEAP, 27 OASIS

Find Notes = Metal > Within Context > Context Type = Hearth
Returned = 6 results: 5 LEAP, 1 OASIS

Closer examination shows that 2 of the 6 LEAP results are in fact samples, rather than finds and misattributed in the STAR data extraction. It was not realised that LEAP samples are held within the general finds table in the dataset and indicated as samples by a code in the table. This illustrates the complexity of mapping/extracting data to the CRM; it is not simply a matter of mapping database tables or columns to ontology elements – see further discussion in section 4.2, where a solution is outlined.

Searching the Notes field as free text tends to be less reliable than searching Types (although it can yield results otherwise not found). Employing concept-based search:

Find type = Metalworking debris
Returned 94 results: 42 LEAP, 52 MoLA ROP

Find Type = Metalworking debris > within context> Context type = Hearth: debris
Returned = 1 LEAP 

- an ash layer of hearth [3681] used for possible production of nails.

Broadening the search to industrial working more generally,

Context Find = Slag 
Returned 47 results: 25 OASIS, 7 LEAP, 11 MoLA ROP , 4 RRAD

Context Find = Slag > within Context > Context Type = hearth
Returned 7 results: 7 OASIS 

We see that results are returned across the various datasets and that seven grey literature results associate evidence of slag with hearths. While these results show the potential of searching on controlled types, the current semantic search does not perform the query expansion that might associate hearth with hearth: debris, assuming they were semantically connected in any underlying thesaurus (further discussed in section 4.4).


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