usecases

RL2 Use Cases

Total: 51 use cases — 17 complete, 34 draft

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Status

Status	Symbol	Meaning
Complete	✅	Documented with RL2 Turtle model
Draft	📝	Documented, RL2 model pending

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Core Patterns (1-17)

#	File	Pattern	Status
1	pay-to-play.md	Tun-sollen (I must do it myself)	✅
2	team-license.md	Sein-sollen (anyone can fulfill)	✅
3	break-glass.md	Event + personal liability	✅
4	fire-alarm.md	Event, decoupled	✅
5	wire-transfer-sod.md	Separation of Duty	✅
6	check-signing-sod.md	Dynamic SoD	✅
7	ethics-approval.md	Multi-party workflow	✅
8	data-stewardship.md	Promise fulfillment	✅
9	gdpr-erasure.md	GDPR data subject rights	✅
10	audit-trail.md	Compliance prerequisite	✅
11	data-freshness-promise.md	Promise + violation	✅
12	schema-evolution.md	Event + temporal	✅
13	quality-circuit-breaker.md	State machine	✅
14	step-up-auth.md	Conditional duty	✅
15	chinese-wall.md	Event-based expiry	✅
16	concurrent-seats.md	Global state counter	✅
17	trial-period.md	Temporal transition	✅

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External Data Licenses (18-23)

#	File	Pattern	Gap Filled	Status
18	internal-use-only.md	Basic restriction	—	📝
19	no-redistribution.md	Prohibition + pass-through	—	📝
20	derived-data-restriction.md	Conditional prohibition	—	📝
21	usage-metering.md	Count-based constraint	—	📝
22	display-vs-nondisplay.md	Use-type differentiation	—	📝
23	pass-through-terms.md	Downstream obligations	—	📝

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Data Contract Patterns (24-31)

#	File	Pattern	Gap Filled	Status
24	purpose-restriction.md	Purpose whitelist	isAnyOf	📝
25	geo-restriction.md	Jurisdiction control	isNoneOf	📝
26	legal-review-gate.md	Approval workflow	Offer→Agreement	📝
27	approval-revocation.md	Power to revoke	Power	📝
28	data-retention-limit.md	Time-bound deletion	—	📝
29	anonymization-required.md	Processing constraint	—	📝
30	no-ml-training.md	Use prohibition	—	📝
31	multi-level-approval.md	Sequential approvals	—	📝

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EU Data Spaces / IDS (32-37)

#	File	Pattern	Gap Filled	Status
32	connector-certification.md	Certified connector	—	📝
33	data-sovereignty.md	Provider controls	—	📝
34	volume-limit.md	Data amount restriction	—	📝
35	logging-notification.md	Must log or notify	—	📝
36	deletion-after-use.md	Post-processing deletion	—	📝
37	time-window-access.md	Temporal restriction	—	📝

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Hohfeldian Completeness (38-42)

#	File	Pattern	Gap Filled	Status
38	claim-counterclaim.md	Correlative positions	Claim	📝
39	immunity-from-termination.md	Protection from power	Immunity	📝
40	power-to-grant.md	Authority to create	Power	📝
41	liability-exposure.md	Exposure to power	—	📝
42	no-claim-inference.md	Privilege correlative	—	📝

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Vocabulary Completeness (43-49)

#	File	Pattern	Gap Filled	Status
43	exclusive-license.md	Exactly-one choice	xone	📝
44	multi-certification.md	All required	isAllOf	📝
45	negated-condition.md	Unless clause	not	📝
46	role-hierarchy.md	Type-based access	isA	📝
47	asset-collection-access.md	Bulk dataset	AssetCollection	📝
48	compliance-attestation.md	Status declaration	Assertion	📝
49	policy-versioning.md	Generation tracking	policyGeneration	📝

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Protocol (50-51)

#	File	Pattern	Gap Filled	Status
50	runtime-evaluation.md	Evaluation trace	rl2p:Requirement	📝
51	fulfillment-evidence.md	Audit trail	rl2p:fulfillmentEvidence	📝

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Sources

Use case selection informed by:

• W3C ODRL Use Cases and Requirements (27 patterns)
• IDS Policy Patterns for Usage Control in Data Spaces
• ODRL Temporal Profile
• Bloomberg, LSEG, CME, ICE license terms (external data patterns)

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Vocabulary Coverage

Core patterns (1-17) demonstrate:

Construct	Use Cases
Privilege	All
Duty	1, 2, 7, 8, 9, 10, 11, 12, 13
Prohibition	15
Promise	8, 11
Liability	3
Event	3, 4, 12, 15
obligationStateOperand	1, 2, 10, 13
dutyPerformerOperand	1, 5, 6

Draft use cases (18-51) fill remaining vocabulary gaps:

Construct	Use Case
Claim	38
Power	27, 40
Immunity	39
Offer/Agreement	26
Assertion	48
AssetCollection	47
isAnyOf	24
isNoneOf	25
isAllOf	44
xone	43
not	45
isA	46
policyGeneration	49
rl2p:Requirement	50
rl2p:fulfillmentEvidence	51

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Next Steps

Work through drafts in batches to add RL2 models. Priority:

1. Vocabulary gaps (24-27, 38-40, 43-49) — demonstrate unused constructs
2. External licenses (18-23) — real-world applicability
3. IDS patterns (32-37) — EU data space alignment