Overview
ISO 21549-3:2014 - "Health informatics - Patient healthcard data - Part 3: Limited clinical data" defines the structure and data objects for storing and transporting limited clinical information on patient-held healthcards that follow the ID-1 physical dimensions (ISO/IEC 7810). The standard describes limited clinical data objects using UML, plain text and Abstract Syntax Notation (ASN.1). It specifies the basic structure of the data object LimitedClinicalData (intended to aid emergency care) but does not mandate specific data sets or the security mechanisms used to protect them.
Key topics and requirements
- Scope and applicability
- Targeted at patient healthcards compliant with ID-1 physical dimensions.
- Focused on limited clinical data suitable for transport on portable cards.
- Data modelling
- Uses UML class diagrams and ASN.1 to define interoperable data object structures.
- Encourages modular composition of objects and reuse of common objects from ISO 21549-2.
- Defined clinical content areas
- Limited emergency data set and extended emergency data set
- Immunization details
- Blood grouping and transfusion record
- Supporting objects and attributes
- CodedData: handles coded values; coding schemes may be specified or left open where not mandatory.
- Security attributes (e.g., SecurityServices): storage of attributes for confidentiality, integrity, authentication-mechanisms left to implementers.
- Accessory attributes and linkage objects to optimize memory and share common attributes across records.
- What is out of scope
- Encoding of free text, specific security mechanisms, access control workflows, card initialization/issuing, and downstream message processing.
Applications and who should use it
- Card manufacturers and chip/ID card integrators designing patient healthcards that carry clinical pointers or limited records.
- Healthcare IT architects and EHR integrators implementing portable data exchange between point-of-care systems and emergency services.
- Emergency care systems and ambulance IT vendors needing standardized access to concise patient clinical data (immunization, allergies, blood group).
- Public health agencies, insurers and cross-border healthcare programs requiring standardized formats for transportable clinical facts.
- Standards developers and implementers building interoperable healthcare card solutions that reference ISO 21549 family components.
Related standards
- ISO 21549-1: General structure
- ISO 21549-2: Common objects (normatively referenced)
- ISO 21549 parts 4–8 (Extended clinical, Identification, Administrative, Medication, Links)
- ISO/IEC 7810 (ID-1 card physical dimensions)
Keywords: ISO 21549-3:2014, health informatics, patient healthcard data, limited clinical data, ASN.1, UML, ID-1 cards, emergency data set, immunization, blood grouping, security attributes.