Overview
EN ISO 21043-1:2025 (ISO 21043-1:2025) is the CEN-adopted vocabulary standard for the forensic sciences. Its scope is to standardize terms used across the forensic process - from the scene to the courtroom - ensuring consistent meaning for words such as analysis, examination, chain of custody, interpretation, forensic service provider, and many others. This second edition (2025) supersedes EN ISO 21043-1:2018 and is organized alphabetically to follow natural English word order.
Key topics and requirements
- Standardized terminology: Defines terms and definitions for core components of the forensic process (e.g., analysis, examination, interpretation, contamination, control sample).
- Process coverage: Vocabulary covers activities and roles across the forensic workflow - recovery, analysis, interpretation, reporting, and evidence handling.
- Quality-related concepts: Includes terms essential to quality and governance such as document control, administrative review, impartiality, interlaboratory/intralaboratory comparison, and proficiency test.
- Decision and reporting language: Clarifies interpretive concepts like categorical opinion, evaluative interpretation, explanation, and identification versus classification.
- Practical definitions: Addresses operational items (e.g., consumable, facility, first responder, chain of custody) to support consistent practice.
- Structure and references: The document contains no normative references and points users to ISO and IEC terminology databases for broader standardization context. Annex A provides a flowchart of the forensic process (scene → courtroom).
Applications and users
Who benefits from EN ISO 21043-1:2025:
- Forensic laboratories and forensic service providers implementing consistent documentation and reporting.
- Examiners and technical staff seeking common definitions for training, SOPs and case files.
- Law enforcement, prosecutors, defence counsel and courts that rely on clear, unambiguous forensic terminology.
- Accreditation bodies and quality managers aligning forensic operations with international vocabulary.
Practical uses include harmonizing internal procedures, improving inter-agency communication, supporting examination strategies, and reducing ambiguity in expert testimony.
Related standards
- ISO 21043 series: Parts 2, 3, 4 and 5 (discipline-specific processes and guidance).
- Prepared by ISO/TC 272 (Forensic sciences) in collaboration with CEN/TC 419.
Keywords: forensic vocabulary, ISO 21043-1:2025, EN ISO 21043-1, forensic process, chain of custody, forensic terminology, forensic service provider.
