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Glossary

IDL (Interface Definition Language) in 3GPP: meaning and where it is specified

Published 2026-10-16Updated 2026-10-16

At a glance

Term
IDL
Stands for
Interface Definition Language
Defined in
3GPP TR 21.905 V19.2.0, clause 4
Used in
TS 26.347, TS 29.500, TS 32.153

In plain words

IDL means Interface Definition Language. TS 26.347 describes it as "a standard language for defining function and method interfaces". In TS 29.500, OpenAPI Specification shall be used as the IDL of SBI. In TS 32.153, one module is used to define the IDL constructs for managed object classes.

Source: 3GPP TS 26.347 V19.0.0, clause A.2.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/26_series/26.347/26347-j00.zip

Sources

  1. 3GPP TR 21.905 V19.2.0, clause 4. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/21_series/21.905/21905-j20.zip
  2. 3GPP TS 26.347 V19.0.0, clause A.2.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/26_series/26.347/26347-j00.zip
  3. 3GPP TS 29.500 V20.0.0, clause 5.5. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/29_series/29.500/29500-k00.zip
  4. 3GPP TS 32.153 V19.0.0, clause B.2.4. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/32_series/32.153/32153-j00.zip

How this page was made

The facts box comes straight from the 3GPP TDoc list and specification archive as indexed by 3GPP Scout. An AI model (GPT-6 Luna) wrote the paragraph and named the source of each sentence. Code checked every quote word for word against the stored source text and every number against the cited source. A second AI model from another company (Claude Opus 5.5) reviewed the paragraph against the same sources. The 3GPP documents themselves govern.