Linked Defence Geospatial Information Framework

Welcome to the experimental Linked Data wrapper for the DGIWG Defence Geospatial Information Framework (DGIF): one URI for each feature type, attribute, value, association and Real World Object Index term, as an RDFS vocabulary. The wrapper serves the six DGIF 3 baselines, 2024-1 to 2026-1, from DGIWG's models, and mappings from DGIF to AdV and to OpenStreetMap as SSSOM mapping sets, the latter from a Swiss table. See the FAQ.

DGIF has three parts, all served here:

Information Model (DGIM, DGIWG 205): the structure, which attributes and values each type allows, how types inherit and associate.
Feature Concept Dictionary (DGFCD, DGIWG 206): the concepts, each with a code, name and definition: feature types (Building AL013), attributes and their values.
Real World Object Index (DGRWI, DGIWG 207): everyday terms as a type plus values: Lake is an Inland Waterbody whose Inland Water Type is lake.

Some feature types

With their supertypes (rdfs:subClassOf):

Entity (ZI034)
- Feature Entity (ZI028)
  - Building (AL013)
  - Forest (EC015)
  - Crop Land (EA010)
  - Grassland (EB010)
  - Orchard (EA040)
  - Inland Waterbody (BH082)
  - Built-up Area (AL020)
  - Populated Place (AL022)
  - Sports Ground (AK040)
  - Park (AK120)
  - Facility (AL010)
    - Golf Course (AK100)
    - Amusement Park (AK030)

Some Real World Object Index terms

Each is a type, usually narrowed by attribute values:

School (RWO_05027): a Building whose Feature Function is education
Hospital (RWO_05113): a Facility whose Feature Function is human health
University (RWO_05122): a Facility whose Feature Function is higher education
Airport (RWO_00129): an Aerodrome whose Airfield Type is major
Telecommunications Mast (RWO_04203): a Tower with the shape mast and the type telecommunications tower
Underground Railway Station (RWO_03942): a Transportation Station for trains, below ground
Monument (RWO_04436): a Monument, the type alone
Church (RWO_05269): a Building with Religious Information whose Religious Facility Type is church
Lamasery (RWO_01855): a Facility for religious activities with Religious Information: Buddhist, a monastery

Baselines: the latest, and the earlier ones as mementos

A plain URI describes the resource as of the latest baseline, 2026-1. Earlier baselines are Mementos of it, and the plain URI is their TimeGate: a request with Accept-Datetime is redirected to the baseline in force at that date.

feature/al020/timemap: Built-up Area in every baseline.
feature/al020?version=2024-1: Built-up Area as of 2024-1, with the definition it had then.
attribute/rew?version=2024-1: An attribute 2025-1 dropped: the plain URI answers 404, the memento and the TimeMap remain.

Following standing water through the dictionary

DGIF often describes an everyday concept as a feature type plus attribute values, not as a class of its own. A lake is an Inland Waterbody whose Inland Water Type is lake:

feature/bh082: Inland Waterbody: a class, with a restriction per attribute giving the values it allows (owl:allValuesFrom an owl:oneOf) and its cardinality.
attribute/iwt: Inland Water Type: a property, its domain the common supertype of the types using it, its range the value class attribute/iwt#values.
value/iwt_1: Lake, the value: an instance of that class, and which types allow it.
rwo/01852: Lake, the RWOI term: DGIWG's OCL verbatim, and as axioms: a subclass of Inland Waterbody and of the restriction owl:hasValue lake on inlandWaterType.
rwo/05060: Industrial Area: a Built-Up Area (feature/al020) with functionalUse = industrial (value/fuc_1).

Associations: roles and their subproperties

role/describesreligiousinformation: A role shared by associations from several types; domain and range are their common supertypes.
association/buildingreligiousinfo: Its subproperty from Building to Religious Information.
association/buildingbuildingsuperstructure: Building to Building Superstructure; its start role names the way back, #inverse, an owl:inverseOf under role/supportssuperstructure.

From DGIF to other vocabularies

mapping/adv: DGIF to the AAA classes of GeoInfoDok 7.1: Forest with foliage type deciduous is a close match of AX_Wald with vegetationsmerkmal Laubholz. As SSSOM TSV: mapping/adv.sssom.tsv.
mapping/osm: The Swiss table read from DGIF's side, to the tags of Linked OSM: Building with featureFunction cinema is a close match of amenity=cinema, as a point; a car wash point is narrower than a Building, a car wash area narrower than a Facility. historic=memorial has no DGIF term: the table names Monument AL130, but Monument is AL131; served verbatim in the comment, not guessed.

Quirks of the source, and how they are served

rwo/05085: Farmland: the OCL says Cropland, the type is named CropLand; type names resolve case-insensitively.
rwo/04555?version=2024-1: Bartizan in 2024-1: a misspelt attribute (hsitoricSignificance), served verbatim as vocab:oclUnparsed, not guessed at. 2025-1 fixed it: rwo/04555.
rwo/00632: Cemetery: one of 621 terms whose OCL reads “attribute 0 with value 0”, read as the type alone and marked so.
attribute/sdn: An attribute a type uses but the model has no concept for; served from the type, without a definition.
value/hut_1: Sami hut: the model gives it no alias and files it under the wrong attribute; HUT_1 comes from Hut's enumeration.
feature/zz999: No such code: 404, in the representation asked for.

Collections and descriptions

feature/ — the 683 feature types and types
attribute/ — the attributes
value/ — every attribute value
rwo/ — the Real World Object Index
role/ — the 123 association roles
association/ — the 717 associations
mapping/ — the mapping sets, to AdV and to OSM
faq.html — frequently asked questions
dump.tar.gz — every document of 2026-1 as a Turtle file at its path (feature/al013.ttl), with relative references as served
index.ttl — the dataset and this wrapper
routes.json — every route, its formats and parameters
vocab — the few terms coined here