3GPP 21.900 v20.0.0 — the document's own text
2 Definitions and abbreviations
Taught in 2. The shape of 3GPP, and what the record does not say about it (How standards actually get made, in depth), 9. Why the documents read the way they do (How standards actually get made, in depth), 2. The shape of 3GPP, and where the data stops (How standards actually get made, overview), 2. Who writes them — two organisations, two habits (How standards actually get made, quick start), 3. One idea, from proposal to published text (How standards actually get made, quick start).
For the purposes of the present document, the following terms and those in 3GPP TR 21.905 [2] apply.
building block: sub-division of a feature, representing a coherent set of technical functionality which would generally be expected to reside in a single system element.
change control: procedure whereby proposed modifications to a specification are presented for approval to the TSG as formal Change Requests.
closed: release status or specification status in which no changes of any kind to the release or the specification are permitted.
Change Request (CR): formal proposal presented on a standard form to modify a specification which is under change control.
draft: specification status prior to change control, in which changes may be made without formal Change Requests.
early implementation: implementation of a particular feature on a platform of a release earlier than the release that contains the feature.
feature: new or substantially enhanced functionality which represents added value to the existing system.
frozen: release status or specification status in which only essential corrections are permitted.
functionality: normative text contained in one or more Technical Specifications, corresponding either to a feature or to some portion of a feature.
group: TSG or TSG sub-group.
major version: For version x.y.z of a specification, x is called the major version.
Example: For version 3.2.0 of a specification, the major version is 3.
Mobile Competence Centre (MCC): The permanent secretariat, or support team, of 3GPP.
pseudo Change Request (pCR): similar to a Change Request but has no CR number and is intended to propose new or revised text for inclusion in 3GPP TSs or TRs not yet under change control (i.e. still in the drafting phase). Known in some groups as "text proposal".
specification: generic term standing for Technical Specification and Technical Report.
Study Item (SI): type of Work Item which will conduct feasibility studies and will result in a Technical Report
Study Item description (SID): description of a Study Item in a standard Work Item Description sheet.
TSG: Technical Specification Group.
TSG change control: specification status in which the Technical Specification Group is responsible for approval of Change Requests.
TSG sub-group: Working Group or subgroup of a Working Group or of a Sub-Group.
Working Group (WG): official subgroup of a TSG reporting to that TSG.
WG Change Control: specification status in which the Working Group is responsible for agreeing Change Requests for submission to the TSG for approval.
version: unique identifier in the form x.y.z for a specification at a given point in time.
Example: version 3.12.3.
withdrawn: specification status in which the given version of the specification no longer belongs to the appropriate set of valid specifications.
Work Item (WI): description of an enhancement to a technical area, which may be categorized as Study Item, Feature, Building Block or Work Task.
Work Item description (WID): description of a Work Item in a standard Work Item Description sheet.
work task: sub-division of a building block, representing a self-contained, well-scoped and well-scheduled item of work.