Glossary
| Field |
Value |
| Document |
Bilingual Domain and Architecture Glossary |
| Version |
1.0 |
| Parent |
BRD.md |
| Last updated |
2026-06-19 |
Telecom domain terms are kept in their industry-standard form. Turkish regulatory and
identity terms are retained because they are domain-specific (KVKK, TCKN, VKN, BTK).
1. Telecom Domain Terms
| Term |
Turkish |
Definition |
| MSISDN |
Abone numarasi |
Mobile Subscriber ISDN. The subscriber phone number; a system-wide unique identifier. |
| IMSI |
- |
International Mobile Subscriber Identity. Unique identity stored on the SIM. |
| ICCID |
SIM seri numarasi |
SIM card serial number. |
| Subscription |
Abonelik |
A customer's active membership to a specific tariff/plan. |
| Tariff / Plan |
Tarife / Paket |
The minutes, SMS, and data package offered to a subscriber. |
| VAS |
Katma degerli servis |
Value Added Service (caller tunes, cloud, insurance, etc.). |
| CDR |
Arama detay kaydi |
Call Detail Record. A single call/SMS/data usage event; the basis for billing. |
| Top-up |
Bakiye yukleme |
Balance loading for prepaid lines (post-MVP). |
| MNP |
Numara tasima |
Mobile Number Portability; operator change / number transfer (post-MVP). |
| BSCS / OCS |
Faturalama motoru |
Billing and Charging System; the real-operator billing engine. |
| Overage |
Asim |
Usage beyond the included quota, charged on the next invoice. |
| Quota |
Kota |
Remaining included allowance (minutes, SMS, MB) for a period. |
| Postpaid |
Faturali |
Pay-after-use billing model. |
| Prepaid |
On odemeli |
Pay-before-use balance model (post-MVP). |
2. Identity and Regulatory Terms
| Term |
Turkish |
Definition |
| TCKN |
T.C. Kimlik No |
Turkish national identity number for individuals. |
| VKN |
Vergi Kimlik No |
Turkish tax identity number for corporations. |
| KYC |
Kimlik dogrulama |
Know Your Customer; identity verification process. |
| KVKK |
KVKK |
Turkish Personal Data Protection Law (analogous to GDPR). |
| GDPR |
GDPR |
EU General Data Protection Regulation. |
| BTK |
BTK |
Turkish Information and Communication Technologies Authority (telecom regulator). |
| PII |
Kisisel veri |
Personally Identifiable Information. |
| Term |
Definition |
| Bounded Context |
A clearly delimited boundary within which a domain model is valid (DDD). |
| Saga |
A pattern coordinating a distributed transaction with compensation steps. |
| Outbox Pattern |
A table-based technique making a DB transaction and message publish atomic. |
| Inbox Pattern |
Consumer-side deduplication to guarantee idempotent event processing. |
| Idempotency |
The property that repeating an operation does not change the result. |
| CQRS |
Command Query Responsibility Segregation; separating write and read responsibilities. |
| Mediator |
A single dispatch entry point routing requests through pipeline behaviors to handlers. |
| Pipeline Behavior |
A cross-cutting step (validation, security, logging, transaction) in the mediator flow. |
| Circuit Breaker |
A pattern that stops calls automatically when an error threshold is exceeded (Resilience4j). |
| Eventual Consistency |
A consistency model where replicas converge over time, not instantly. |
| Schema Registry |
A service that stores and governs Avro event schemas and compatibility rules. |
| Service Mesh |
Infrastructure layer managing service-to-service communication (e.g. Istio); post-MVP. |
| HPA |
Horizontal Pod Autoscaler; Kubernetes horizontal scaling. |
| BFF |
Backend For Frontend; an aggregation layer tailored to a client. |
| ApiResult |
The standard response wrapper for all external APIs (ADR-015). |
Document end.