Intent
10 classesThe purpose and direction — WHY the system or organization exists and what it is trying to achieve. Missions, objectives, goals, strategies, visions, drivers, needs, aims and value propositions.
The methodology
Six facets, and every class graded against them
Intent · Structure · Boundaries · Evidence · Governance · Operations — the six-facet classification of any node type or page by the kind of knowledge it represents.
Engineering knowledge is not one kind of thing. A mission objective, a thermal constraint, a test report and an approval record are answers to different questions, and a tool that stores them in one undifferentiated pile cannot tell you what is missing. ISBEGO names the six questions, so "what have we not covered" becomes answerable instead of rhetorical.
Structure
23 classesThe make-up and composition — WHAT the system and organization are built from. Components, systems, subsystems, assemblies, parts, modules, functions, interfaces and architecture, as well as the organizational structure: organizations, divisions, departments, business units, teams, roles, positions, employees and people, and physical assets.
Boundaries
19 classesThe limits and rules that constrain the system — what it must and must not do. Requirements, constraints, standards, regulations, policies, rules, scope, thresholds, limits and applicable interfaces-as-constraints.
Evidence
17 classesThe artefacts and proof that things are true or done. Documents, deliverables, reports, records, datasets, specifications, models, drawings, and the results of tests, analyses, verification and validation.
Governance
21 classesDecisions, authority and oversight — how the work is steered and controlled. Decisions, risks, issues, assumptions, approvals, reviews, audits, stakeholders, authorities, accountabilities, roles & responsibilities, and doctrine or policy direction.
Operations
32 classesThe activities and execution — how the work actually gets done over time. Tasks, activities, actions, processes, procedures, workflows, schedules, milestones, events, and the resources, capacity and logistics consumed in running it.
Capture, qualify, trace, control
A classification is only worth having if the system does something with it. Each step below is a count from the ontology, not a capability we are describing.
- Capture
382
entity types
Across 7 applications, each one a named thing the estate can hold — not a free-text field.
- Qualify
325
facet values
Across 30 classification dimensions. ISBEGO is one of them; the rest grade risk, sector, lifecycle phase and more.
- Trace
129
schema rules
With 36 relationship types. What may connect to what is declared, so a traceability gap is a query rather than a reading exercise.
- Control
122
gradings
Every one carries where it came from and how sure it is. 122 distinct classes are graded against ISBEGO.
Units are a setting, not a rewrite
The same estate serves teams that work in kilometres and teams that work in nautical miles. Units are held per dimension, so a figure is stored once and rendered in whatever the reader has chosen — change it in the rail on the left and these move. The values are read from SMAT's constant store, not typed here.
- Earth equatorial radius
- 6,378.137 kmlinear
EARTH_RADIUS_KM
- Astronomical unit
- 1.495979e+8 kmlinear
AU_KM
- Sidereal day
- 0.99727 dayslinear
SIDEREAL_DAY_S
- Tropical year
- 365.25 dayslinear
EARTH_TROPICAL_YEAR_DAYS
- Earth obliquity (J2000)
- 23.439291 °linear
EARTH_OBLIQUITY_J2000_DEG
- Speed of light
- 299,792.458 km/slinear
SPEED_OF_LIGHT_KM_S
- Earth surface gravity
- 9.80665 m/s²linear
EARTH_SURFACE_GRAVITY_M_S2
- Boltzmann constant
- -228.6 dBW/K/Hzlog₁₀
BOLTZMANN_DBW_PER_K_PER_HZ
Composed unit — not offered a conversion. The rail does no dimensional algebra, and dBW per kelvin per hertz is not the power dimension however much its symbol resembles one.
Where each grading came from
A classification without provenance is an opinion. Every ISBEGO grading in the ontology records the rule, map or model that produced it, and a confidence — so a reviewer can tell a curated decision from an inferred one without asking anybody.
By source
rule:isbego-dimension-semantics64curated-map:nodeTypeIsbegoDefaults29ai:class-semantic17rule-seed:classificationSeed11curated:threat-chain-tc11
By confidence
- medium92
- high30
Every figure on this page is generated from Data Domain's seed data at build time; the build fails if the page and the source disagree. See what re-derives each one, down to the file and the commit. The vocabulary itself is published in full at the reference.