Link from a text span in an eprint to a knowledge graph entity
Record Key
tid
Timestamp-based ID
Properties
Confidence score for the link (scaled by 1000 for 0.0-1.0 range)
minimum: 0maximum: 1000
An RFC 3339 formatted timestamp.
AT-URI of the eprint containing the linked text
The entity being linked to
Schema revision this record was created with. Absent means revision 1.
minimum: 1
Text span being linked to an entity
View raw schema
{
"key": "tid",
"type": "record",
"record": {
"type": "object",
"required": [
"eprintUri",
"target",
"linkedEntity",
"createdAt"
],
"properties": {
"target": {
"ref": "#textSpanTarget",
"type": "ref",
"description": "Text span being linked to an entity"
},
"createdAt": {
"type": "string",
"format": "datetime"
},
"eprintUri": {
"type": "string",
"format": "at-uri",
"description": "AT-URI of the eprint containing the linked text"
},
"confidence": {
"type": "integer",
"maximum": 1000,
"minimum": 0,
"description": "Confidence score for the link (scaled by 1000 for 0.0-1.0 range)"
},
"linkedEntity": {
"refs": [
"#graphNodeLink",
"#externalIdLink",
"#authorLink",
"#eprintLink"
],
"type": "union",
"description": "The entity being linked to"
},
"schemaRevision": {
"type": "integer",
"minimum": 1,
"description": "Schema revision this record was created with. Absent means revision 1."
}
}
},
"description": "Link from a text span in an eprint to a knowledge graph entity"
}
Link to an ATProto author
Properties
Author's ORCID (if available)
No description available.
View raw schema
{
"type": "object",
"required": [
"type",
"did",
"displayName"
],
"properties": {
"did": {
"type": "string",
"format": "did",
"description": "Author's DID"
},
"type": {
"type": "string",
"const": "author"
},
"orcid": {
"type": "string",
"description": "Author's ORCID (if available)"
},
"handle": {
"type": "string",
"format": "handle",
"description": "Author's handle"
},
"displayName": {
"type": "string",
"description": "Author's display name"
}
},
"description": "Link to an ATProto author"
}
Bounding rectangle coordinates for highlight positioning. All values stored as strings to preserve floating-point precision since ATProto only supports integer type.
Properties
Page height reference (as string to preserve float precision)
1-indexed page number for the bounding rectangle
minimum: 1
Page width reference (as string to preserve float precision)
Left edge coordinate (as string to preserve float precision)
Right edge coordinate (as string to preserve float precision)
Top edge coordinate (as string to preserve float precision)
Bottom edge coordinate (as string to preserve float precision)
View raw schema
{
"type": "object",
"required": [
"x1",
"y1",
"x2",
"y2",
"width",
"height",
"pageNumber"
],
"properties": {
"x1": {
"type": "string",
"description": "Left edge coordinate (as string to preserve float precision)"
},
"x2": {
"type": "string",
"description": "Right edge coordinate (as string to preserve float precision)"
},
"y1": {
"type": "string",
"description": "Top edge coordinate (as string to preserve float precision)"
},
"y2": {
"type": "string",
"description": "Bottom edge coordinate (as string to preserve float precision)"
},
"width": {
"type": "string",
"description": "Page width reference (as string to preserve float precision)"
},
"height": {
"type": "string",
"description": "Page height reference (as string to preserve float precision)"
},
"pageNumber": {
"type": "integer",
"minimum": 1,
"description": "1-indexed page number for the bounding rectangle"
}
},
"description": "Bounding rectangle coordinates for highlight positioning. All values stored as strings to preserve floating-point precision since ATProto only supports integer type."
}
Link to another eprint/preprint
Properties
No description available.
View raw schema
{
"type": "object",
"required": [
"type",
"uri",
"title"
],
"properties": {
"doi": {
"type": "string",
"description": "DOI if available"
},
"uri": {
"type": "string",
"format": "at-uri",
"description": "AT-URI of the eprint"
},
"type": {
"type": "string",
"const": "eprint"
},
"title": {
"type": "string",
"description": "Eprint title"
}
},
"description": "Link to another eprint/preprint"
}
Link to an external identifier (Wikidata, ROR, ORCID, etc.)
Properties
Identifier value (e.g., Q42 for Wikidata)
Display label for the entity
External identifier system
Known values: wikidata, ror, orcid, isni, viaf, lcsh, fast, credit, spdx, fundref, mesh, aat, gnd, anzsrc, arxiv, doi, pmid, pmcid
No description available.
Full URI for the external entity
View raw schema
{
"type": "object",
"required": [
"type",
"system",
"identifier",
"label"
],
"properties": {
"uri": {
"type": "string",
"format": "uri",
"description": "Full URI for the external entity"
},
"type": {
"type": "string",
"const": "externalId"
},
"label": {
"type": "string",
"description": "Display label for the entity"
},
"system": {
"type": "string",
"description": "External identifier system",
"knownValues": [
"wikidata",
"ror",
"orcid",
"isni",
"viaf",
"lcsh",
"fast",
"credit",
"spdx",
"fundref",
"mesh",
"aat",
"gnd",
"anzsrc",
"arxiv",
"doi",
"pmid",
"pmcid"
]
},
"identifier": {
"type": "string",
"description": "Identifier value (e.g., Q42 for Wikidata)"
}
},
"description": "Link to an external identifier (Wikidata, ROR, ORCID, etc.)"
}
Link to a knowledge graph node (type or object, with optional subkind)
Properties
Node kind: 'type' for classifications, 'object' for instances
Known values: type, object
Display label for the node
Human-readable slug (e.g., 'computer-science')
Subkind slug (e.g., 'field', 'facet', 'institution', 'contribution-type')
AT-URI of the subkind type node
No description available.
View raw schema
{
"type": "object",
"required": [
"type",
"uri",
"label",
"kind"
],
"properties": {
"id": {
"type": "string",
"description": "Node UUID identifier"
},
"uri": {
"type": "string",
"format": "at-uri",
"description": "AT-URI of the graph node"
},
"kind": {
"type": "string",
"description": "Node kind: 'type' for classifications, 'object' for instances",
"knownValues": [
"type",
"object"
]
},
"slug": {
"type": "string",
"description": "Human-readable slug (e.g., 'computer-science')"
},
"type": {
"type": "string",
"const": "graphNode"
},
"label": {
"type": "string",
"description": "Display label for the node"
},
"subkind": {
"type": "string",
"description": "Subkind slug (e.g., 'field', 'facet', 'institution', 'contribution-type')"
},
"subkindUri": {
"type": "string",
"format": "at-uri",
"description": "AT-URI of the subkind type node"
}
},
"description": "Link to a knowledge graph node (type or object, with optional subkind)"
}
W3C TextPositionSelector for character-based targeting
Properties
Bounding rectangle for visual positioning
End character offset
minimum: 0
0-indexed page number in the document
minimum: 0
Start character offset
minimum: 0
No description available.
View raw schema
{
"type": "object",
"required": [
"type",
"start",
"end",
"pageNumber"
],
"properties": {
"end": {
"type": "integer",
"minimum": 0,
"description": "End character offset"
},
"type": {
"type": "string",
"const": "TextPositionSelector"
},
"start": {
"type": "integer",
"minimum": 0,
"description": "Start character offset"
},
"pageNumber": {
"type": "integer",
"minimum": 0,
"description": "0-indexed page number in the document"
},
"boundingRect": {
"ref": "#boundingRect",
"type": "ref",
"description": "Bounding rectangle for visual positioning"
}
},
"description": "W3C TextPositionSelector for character-based targeting"
}
W3C TextQuoteSelector for resilient text matching
Properties
Text immediately before the match
maxLength: 32 bytes
Text immediately after the match
maxLength: 32 bytes
No description available.
View raw schema
{
"type": "object",
"required": [
"type",
"exact"
],
"properties": {
"type": {
"type": "string",
"const": "TextQuoteSelector"
},
"exact": {
"type": "string",
"description": "The exact text to match"
},
"prefix": {
"type": "string",
"maxLength": 32,
"description": "Text immediately before the match"
},
"suffix": {
"type": "string",
"maxLength": 32,
"description": "Text immediately after the match"
}
},
"description": "W3C TextQuoteSelector for resilient text matching"
}
W3C Web Annotation target for text spans
Properties
Optional position selector for precise targeting
Primary selector for resilient text matching
AT-URI of the source document
View raw schema
{
"type": "object",
"required": [
"source",
"selector"
],
"properties": {
"source": {
"type": "string",
"format": "at-uri",
"description": "AT-URI of the source document"
},
"selector": {
"ref": "#textQuoteSelector",
"type": "ref",
"description": "Primary selector for resilient text matching"
},
"refinedBy": {
"ref": "#textPositionSelector",
"type": "ref",
"description": "Optional position selector for precise targeting"
}
},
"description": "W3C Web Annotation target for text spans"
}