At the end of the transformation we have RDF statements that represent the finding aid data itself, the cataloguing data for the top-level archival component (usually a "collection", DACS-wise), the cataloguing data of the enclosed components (usually a collection's series, subseries, etc), and the hierarchy between components.
For our model the minimal expression of an EAD3 component is a <c>
tag with an identifier attribute and a DACS cataloguing level attribute:
<c id="aspace_ref23_lnh" level="item">
</c>
Every archival component follows our model's basic patterns of having a URI, a type
, and a classified_as
property. For archival components:
* The "id"
URI is derived from the component identifier: http://data.okeeffemuseum.org/archive/component/<c_tag_id_attribute>
.
* { "type": "ManMadeObject" }
for components catalogued at the item
level
* or, { "type": "PhysicalObject" }
for components catalogued at any other DACS level
* a classification as an archival thing (aat:300375748
, "archives")
When this is rendered in JSON-LD we get:
{
"@context": "https://linked.art/ns/v1/linked-art.json",
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh",
"classified_as": [
{
"id": "aat:item",
"label": "item",
"type": "Type"
},
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
}
]
}
Every component in an EAD/XML hierarchy can carry a cataloguing-level attribute intended for expressing the component's level within the hierarchy. These level classifications are passed on as aat stubs of that level. For example:
{
"@context": "https://linked.art/ns/v1/linked-art.json",
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh",
"type": "ManMadeObject",
"classified_as": [
{
"id": "aat:item",
"label": "item",
"type": "Type"
},
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
},
{
"id": "aat:300026877",
"label": "correspondence",
"type": "Type"
}
]
}
These classifications are rendered with the lowercase slugged stub of the level attribute (also addressing any non-ASCII characters or whitespace):
EAD3 Tag | Classification |
---|---|
<c level="fonds"> |
aat:300311705 |
<c level="collection"> |
aat:300026032 |
<c level="group"> |
aat:300026972 |
<c level="subgroup"> |
aat:300135016 |
<c level="series"> |
aat:300054631 |
<c level="file"> |
aat:scopenote |
<c level="item"> |
aat:related |
In EAD3 we can express an archival component's basic identifiers with a combination of <unitid>
tags and a <unittitle>
:
<c id="aspace_ref23_lnh" level="item">
<did>
<unittitle>Boni and Liveright Publishers, letter</unittitle>
<unitid>2000-06-005</unitid>
<container id="aspace_9ef5b4fd4ac5a29dd6272888874002bd" label="correspondence" localtype="box">1</container>
<container id="aspace_04257636d45150a17b00babb37d042c6" localtype="folder" parent="aspace_9ef5b4fd4ac5a29dd6272888874002bd">5</container>
</did>
</c>
Following our basic patterns these can be modelled as identifiers:
Name
with the value of <unittitle>
, classified preferred (aat:300404670
)Identifier
with the value of <unitid>
, classified with a stub, aat:accession
Identifier
with the value of the <c>
tag's id
attribute, classified preferred (aat:300404670
)Identifier
s representing the box and folder locations, classified with stubs (aat:box
and aat:folder
)Identifier
with the value of the component's sequence among its siblings, classified as the sequence (aat:300192339
)The identifiers for an archival item should look something like:
{
"@context": "https://linked.art/ns/v1/linked-art.json",
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh",
"identified_by": [
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/unittitle",
"type": "Name",
"value": "Boni and Liveright Publishers, letter"
},
{
"classified_as": [
{
"id": "aat:accession",
"label": "accession",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/unitid/0",
"type": "Identifier",
"value": "2000-06-005"
},
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/id",
"type": "Identifier",
"value": "aspace_ref23_lnh"
},
{
"classified_as": [
{
"id": "aat:box",
"label": "box",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/container/aspace_d4e3a2d28f9bf58a488aa077887e9f65",
"label": "correspondence",
"type": "Identifier",
"value": "1"
},
{
"classified_as": [
{
"id": "aat:300192339",
"label": "sequences",
"type": "Type"
}
],
"type": "Identifier",
"value": "4"
}
]
}
Most of the descriptive cataloguing in an EAD document becomes LinguisticObject
nodes with classifications that roughly match the meaning of the descriptive tag. For example in this example document the <relatedmaterial>
tag becomes a node classified as aat:related
:
{
"@context": "https://linked.art/ns/v1/linked-art.json",
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh",
"referred_to_by": [
{
"id": "http://data.okeeffemuseum.org/archive/component/aspace_f936701a5829bcbd57f1b94da1601352/related/0",
"type": "LinguisticObject",
"classified_as": [
{
"id": "aat:related",
"label": "Related Material",
"type": "Type"
}
],
"value": "Material originally located in the publication The Enormous Room. Found between pages 26-27. D570.9 .C82 1922"
}
]
}
Individual EAD tags are classified with the following rubric:
EAD3 Tag | Classification |
---|---|
<prefercite> |
aat:300311705 ("citations") |
<abstract> |
aat:300026032 ("abstracts") |
<bioghist> |
aat:300026972 ("biography files") |
<processinfo> |
aat:300135016 ("archival processing") |
<arrangement> |
aat:300054631 ("classification") |
<scopecontent> |
aat:scopenote (stub) |
<relatedmaterial> |
aat:related (stub) |
XML/EAD documents represent the hierarchical 'belonging' relationships between components as a tree of nested children. Minimally this looks like:
<ead>
<archdesc level="collection">
<did>
<unittitle>Papers from the Ghost Ranch Library</unittitle>
</did>
<dsc>
<c level="series">
<did>
<unittitle>Correspondence</unittitle>
</did>
<c level="item">
<did>
<unittitle>Boni and Liveright Publishers, letter</unittitle>
</did>
</c>
</c>
</dsc>
</archdesc>
</ead>
That is, Papers from the Ghost Ranch Library contains Correspondence, which contains a letter (whose title is catalogued as "Boni and Iverlight Publishers, letter".
These relationships are expressed two ways in JSON-LD. First, children describe the path to their parents with a part_of
property that contains the nodes of all the child's ancestors. So:
"part_of": [
{
"classified_as": [
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
},
{
"id": "aat:collection",
"label": "collection",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/collection/papers-from-the-ghost-ranch-library",
"identified_by": [
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "_:b98",
"type": "Name",
"value": "Papers from the Ghost Ranch Library"
}
],
"part": [
"http://data.okeeffemuseum.org/archive/component/aspace_ref571_il6",
"http://data.okeeffemuseum.org/archive/component/aspace_ref13_x97",
"http://data.okeeffemuseum.org/archive/component/aspace_ref604_xlc",
"http://data.okeeffemuseum.org/archive/component/aspace_ref152_nys",
"http://data.okeeffemuseum.org/archive/component/aspace_ref584_xko",
"http://data.okeeffemuseum.org/archive/component/aspace_ref119_3fj",
"http://data.okeeffemuseum.org/archive/component/aspace_ref543_pjn",
"http://data.okeeffemuseum.org/archive/component/aspace_2d01407c020feaeb17422e7b223c30c4",
"http://data.okeeffemuseum.org/archive/component/aspace_ref212_493"
],
"type": "PhysicalObject"
},
{
"classified_as": [
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
},
{
"id": "aat:series",
"label": "series",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref13_x97",
"identified_by": [
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref13_x97/unittitle",
"type": "Name",
"value": "Correspondence"
}
],
"part": [
"http://data.okeeffemuseum.org/archive/component/aspace_ref95_m2f",
"http://data.okeeffemuseum.org/archive/component/aspace_ref83_69y",
"http://data.okeeffemuseum.org/archive/component/aspace_ref111_hr7",
"http://data.okeeffemuseum.org/archive/component/aspace_ref107_cc5",
"http://data.okeeffemuseum.org/archive/component/aspace_ref49_xn6",
"http://data.okeeffemuseum.org/archive/component/aspace_ref75_pyz",
"http://data.okeeffemuseum.org/archive/component/aspace_ref101_iuo",
"http://data.okeeffemuseum.org/archive/component/aspace_ref43_zej",
"http://data.okeeffemuseum.org/archive/component/aspace_ref77_kwq",
"http://data.okeeffemuseum.org/archive/component/aspace_ref55_jgj",
"http://data.okeeffemuseum.org/archive/component/aspace_ref117_ybn",
"http://data.okeeffemuseum.org/archive/component/aspace_ref99_gt7",
"http://data.okeeffemuseum.org/archive/component/aspace_ref41_176",
"http://data.okeeffemuseum.org/archive/component/aspace_ref105_884",
"http://data.okeeffemuseum.org/archive/component/aspace_ref52_j0b",
"http://data.okeeffemuseum.org/archive/component/aspace_ref97_r8k",
"http://data.okeeffemuseum.org/archive/component/aspace_ref91_c2g",
"http://data.okeeffemuseum.org/archive/component/aspace_ref17_pp7",
"http://data.okeeffemuseum.org/archive/component/aspace_ref93_ptc",
"http://data.okeeffemuseum.org/archive/component/aspace_ref25_7vl",
"http://data.okeeffemuseum.org/archive/component/aspace_ref85_l0s",
"http://data.okeeffemuseum.org/archive/component/aspace_ref113_bv6",
"http://data.okeeffemuseum.org/archive/component/aspace_ref115_3zi",
"http://data.okeeffemuseum.org/archive/component/aspace_ref37_i2b",
"http://data.okeeffemuseum.org/archive/component/aspace_ref89_nw6",
"http://data.okeeffemuseum.org/archive/component/aspace_ref19_gmp",
"http://data.okeeffemuseum.org/archive/component/aspace_ref28_m4u",
"http://data.okeeffemuseum.org/archive/component/aspace_ref109_b9d",
"http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh",
"http://data.okeeffemuseum.org/archive/component/aspace_ref73_ncm",
"http://data.okeeffemuseum.org/archive/component/aspace_ref87_u6h",
"http://data.okeeffemuseum.org/archive/component/aspace_ref69_o2r",
"http://data.okeeffemuseum.org/archive/component/aspace_ref21_6hu",
"http://data.okeeffemuseum.org/archive/component/aspace_ref59_cwo",
"http://data.okeeffemuseum.org/archive/component/aspace_ref67_wpo",
"http://data.okeeffemuseum.org/archive/component/aspace_ref57_xzv",
"http://data.okeeffemuseum.org/archive/component/aspace_ref34_2pu",
"http://data.okeeffemuseum.org/archive/component/aspace_ref39_0z1",
"http://data.okeeffemuseum.org/archive/component/aspace_ref71_geh",
"http://data.okeeffemuseum.org/archive/component/aspace_ref15_b6o",
"http://data.okeeffemuseum.org/archive/component/aspace_ref103_ocl",
"http://data.okeeffemuseum.org/archive/component/aspace_ref31_rdk",
"http://data.okeeffemuseum.org/archive/component/aspace_ref63_xk6",
"http://data.okeeffemuseum.org/archive/component/aspace_ref47_mv8",
"http://data.okeeffemuseum.org/archive/component/aspace_ref45_u7w",
"http://data.okeeffemuseum.org/archive/component/aspace_ref65_t6p",
"http://data.okeeffemuseum.org/archive/component/aspace_ref61_h5s",
"http://data.okeeffemuseum.org/archive/component/aspace_ref80_zok"
],
"type": "PhysicalObject"
}
]
Likewise the document that expresses collection and finding aid information shows the full hierarchy from the top down with a part
property:
{
"@context": "",
"id": "http://data.okeeffemuseum.org/archive/collection/papers-from-the-ghost-ranch-library",
"type": "PhysicalObject",
"classified_as": [
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
},
{
"id": "aat:collection",
"label": "collection",
"type": "Type"
}
],
"part": [
{
"classified_as": [
{
"id": "aat:300026877",
"label": "correspondence",
"type": "Type"
},
{
"id": "aat:item",
"label": "item",
"type": "Type"
},
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh",
"identified_by": [
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/unittitle",
"type": "Name",
"value": "Boni and Liveright Publishers, letter"
},
]
}
]
}
crm:P9_is_part_of
predicates.TBD
{
"@context": "https://linked.art/ns/v1/linked-art.json",
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh",
"type": "ManMadeObject",
"classified_as": [
{
"id": "aat:item",
"label": "item",
"type": "Type"
},
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
},
{
"id": "aat:300026877",
"label": "correspondence",
"type": "Type"
}
],
"identified_by": [
{
"classified_as": [
{
"id": "aat:box",
"label": "box",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/container/aspace_d4e3a2d28f9bf58a488aa077887e9f65",
"label": "correspondence",
"type": "Identifier",
"value": "1"
},
{
"classified_as": [
{
"id": "aat:300192339",
"label": "sequences",
"type": "Type"
}
],
"type": "Identifier",
"value": "4"
},
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/unittitle",
"type": "Name",
"value": "Boni and Liveright Publishers, letter"
},
{
"classified_as": [
{
"id": "aat:folder",
"label": "folder",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/container/aspace_0deb3a8b1b64dbbb171182cb26275496",
"type": "Identifier",
"value": "5"
},
{
"classified_as": [
{
"id": "aat:accession",
"label": "accession",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/unitid/0",
"type": "Identifier",
"value": "2000-06-005"
},
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/id",
"type": "Identifier",
"value": "aspace_ref23_lnh"
}
],
"referred_to_by": [
{
"classified_as": [
{
"id": "aat:related",
"label": "Related Material",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_f936701a5829bcbd57f1b94da1601352/related/0",
"type": "LinguisticObject",
"value": "Material originally located in the publication The Enormous Room. Found between pages 26-27. D570.9 .C82 1922"
}
],
"produced_by": {
"carried_out_by": [
"http://data.okeeffemuseum.org/person/1203"
],
"consists_of": [
{
"carried_out_by": [
{
"classified_as": [],
"id": "http://data.okeeffemuseum.org/person/1203",
"identified_by": [
{
"classified_as": [
"aat:300025966"
],
"exact_match": [
"http://id.loc.gov/authorities/names/nr92033475"
],
"id": "http://data.okeeffemuseum.org/person/1203/name/0",
"type": "Name",
"value": "Boni & Liveright"
}
],
"label": "Boni & Liveright",
"type": "Actor"
}
],
"classified_as": [],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/production/crp",
"technique": [
{
"id": "relators:crp",
"label": "Correspondent",
"type": "Type"
}
],
"type": "Production"
},
{
"carried_out_by": [],
"classified_as": [],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/production/",
"technique": [],
"type": "Production"
},
{
"carried_out_by": [
{
"classified_as": [],
"id": "http://data.okeeffemuseum.org/person/260",
"identified_by": [
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"exact_match": [
"ulan:500024301"
],
"id": "http://data.okeeffemuseum.org/person/260/name/0",
"type": "Name",
"value": "Alfred Stieglitz"
}
],
"label": "Alfred Stieglitz",
"type": "Actor"
}
],
"classified_as": [],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/production/rcp",
"technique": [
{
"id": "relators:rcp",
"label": "Recipient",
"type": "Type"
}
],
"type": "Production"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/production",
"timespan": {
"begin_of_the_begin": "1923-11-17T00:00:00",
"end_of_the_end": "1923-11-17T00:00:00",
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref23_lnh/production/timespan",
"label": "1923-11-17",
"type": "TimeSpan"
},
"type": "Production"
},
"part_of": [
{
"classified_as": [
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
},
{
"id": "aat:collection",
"label": "collection",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/collection/papers-from-the-ghost-ranch-library",
"identified_by": [
{
"classified_as": [
{
"id": "aat:internal_id",
"label": "internal id",
"type": "Type"
}
],
"id": "_:b96",
"type": "Identifier",
"value": "65"
},
{
"classified_as": [
{
"id": "aat:accession",
"label": "accession",
"type": "Type"
}
],
"id": "_:b97",
"type": "Identifier",
"value": "MS.31"
},
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "_:b98",
"type": "Name",
"value": "Papers from the Ghost Ranch Library"
}
],
"part": [
"http://data.okeeffemuseum.org/archive/component/aspace_ref571_il6",
"http://data.okeeffemuseum.org/archive/component/aspace_ref13_x97",
"http://data.okeeffemuseum.org/archive/component/aspace_ref604_xlc",
"http://data.okeeffemuseum.org/archive/component/aspace_ref152_nys",
"http://data.okeeffemuseum.org/archive/component/aspace_ref584_xko",
"http://data.okeeffemuseum.org/archive/component/aspace_ref119_3fj",
"http://data.okeeffemuseum.org/archive/component/aspace_ref543_pjn",
"http://data.okeeffemuseum.org/archive/component/aspace_2d01407c020feaeb17422e7b223c30c4",
"http://data.okeeffemuseum.org/archive/component/aspace_ref212_493"
],
"type": "PhysicalObject"
},
{
"classified_as": [
{
"id": "aat:300375748",
"label": "archives (groupings)",
"type": "Type"
},
{
"id": "aat:series",
"label": "series",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref13_x97",
"identified_by": [
{
"classified_as": [
{
"id": "aat:300192339",
"label": "sequences",
"type": "Type"
}
],
"id": "_:b189",
"type": "Identifier",
"value": "0"
},
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref13_x97/unittitle",
"type": "Name",
"value": "Correspondence"
},
{
"classified_as": [
{
"id": "aat:accession",
"label": "accession",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref13_x97/unitid/0",
"type": "Identifier",
"value": "1"
},
{
"classified_as": [
{
"id": "aat:300404670",
"label": "preferred terms",
"type": "Type"
}
],
"id": "http://data.okeeffemuseum.org/archive/component/aspace_ref13_x97/id",
"type": "Identifier",
"value": "aspace_ref13_x97"
}
],
"part": [
"http://data.okeeffemuseum.org/archive/component/aspace_ref95_m2f",
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