IHE Glossary

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Note: Terms in this acronym list are defined in the glossary entries below.

ATNA IHE Profile "Audit Trail and Node Authentication" -- describes certificate-based node authentication and transmitting PHI-related audit events to a repository. This helps sites implement confidentiality policies
AWOS Analytical Work Order Step: A WOS performed by an Analyzer actor.
BPPC IHE Profile "Basic Patient Privacy and Consent" -- provides a mechanism to record the patient privacy consent(s), a method to enforce these consents, and supports the creation of an Affinity Domain defined consent vocabulary that identify information sharing policies
CD Compact Disk
CT IHE Profile "Consistant Time" -- ensures system clocks and time stamps of computers in a network are well synchronized (median error less than 1 second).
DEC IHE Profile "Devise Enterprise Connect"
DMZ De-Militarized Zone. A computer or small sub-network that sits between a trusted internal network, such as a corporate private LAN, and an un-trusted external network, such as the public Internet. Typically, the DMZ contains devices accessible to Internet traffic, such as Web (HTTP) servers, FTP servers, SMTP (e-mail) servers and DNS servers.
ECG Electrocardiogram
ECG IHE Profile "Retrieve ECG for Display" -- specifies a mechanism for Broad Access of ECG documents for review purposes througout an enterprise.
EDIS Emergency Department Information System.
EDR IHE Document Content Profile "Emergency Department Referral Document" -- Allows clinicians to create electronic referrals to the emergency room. This profile builds on medical summaries by adding structures to pass data specific for ED referrals such as the estimated time of arrival and method of transport.
EHR Electronic Health Record
EHR-CR An EHR-CR or Care-delivery Record abstracts the patient information managed by the IT system or set of systems of a Care Delivery Organization, which may support a broad variety of healthcare facilities: private practice, nursing home, ambulatory clinic, acute care in-patient facility, etc.
EHR-LR The documents shared by the EHR-CR and tracked by the Registry form a Longitudinal Record for the patients that received care among the EHR-CRs of the Clinical Affinity Domain. This is known as the EHR-LR.
eMPI Enterprise Master Patient Index.
EMR Electronic Medical Record, an Electronic Health Record system used within an enterprise to deliver care (also called EHR-CR by IHE-XDS).
FSC File-Set Creator
FSR File-Set Reader
GMT Greenwich Mean Time. See UTC
GSPS Grayscale Softcopy Presentation State
GUID Globally Unique Identifier
HIS Hospital Information System
HTML Hypertext Markup Language
ICE Intracardiac Echocardiography
IOD Information Object Definitions
IT Information Technology
ITI IT Infrastructure (IHE domain)
IVUS Intravascular Ultrasound
KDC Key Distribution Center
LIS Laboratory Information System
LUT Look Up Table
MPI Master Patient Index
MPPS Modality Performed Procedure Step
MRN Medical Record Number.
MWL Modality Worklist
OID Object Identifier
PACS Picture Archive and Communication System
PCC Patient Care Coordination (IHE domain)
PCD Patient Care Devices (IHE domain)
PDQ IHE Profile "Patient Demographics Query" -- lets applications query a central patient information server and retrieve a patient’s demographic and visit information.
PHR Personal Health Record
PIR IHE Profile "Patient Information Reconciliation" -- coordinates reconciliation of the patient record when images are acquired for unidentified (e.g. trauma), or misidentified patients.
PIX IHE Profile "Patient Identifier Cross Referencing" -- cross-references patient identifiers between hospitals, sites, RHIOs, etc
PKI Public Key Infrastructure
POCT Point of care testing
POS Point of Service
PPS Performed Procedure Step
QC Quality Control performed by Analyzer actor on a quality control specimen.
RAD Radiology (IHE domain)
RFD IHE Profile "Request Form for Data Capture"
RIS Radiology Information System
SCP Service Class Provider
SCU Service Class User
SPS Scheduled Procedure Step
SR Structured Report
SUID The Study Instance UID from a DICOM SOP instance, or collection of SOP instances.
SWF IHE Profile "Scheduled Workflow" -- integrates ordering, scheduling, imaging acquisition, storage and viewing for Radiology exams
SWOS Specimen Work Order Step. A WOS performed by a Pre/Post Processor actor.
TEE Transesphogeal Echocardiography
TGT Ticket Granting Ticket
TTE Transthoracic Echocardiography
UID Unique Identifier
URI Unique Resource Identifier
UTC Universal Coordinated Time.
WOS Work Order Step
XA X-ray Angiography
XD-Lab IHE Profile "Sharing Lab Reports"
XDM IHE Profile "Cross Enterprise Document Media Interchange"
XDR IHE Profile "Cross Enterprise Document Reliable Interchange"
XDS IHE Profile "Cross Enterprise Document Sharing" -- registers and shares electronic health record documents between healthcare enterprises, ranging from physician offices to clinics to acute care in-patient facilities
XDS-MS IHE Docoument Content Profile "Medical Summary" -- defines the content and format of Discharge Summaries and Referral Notes
XDS-SD IHE Docoument Content Profile "Cross Enterprise Sharing of Scanned Documents"
XPHR IHE Profile "Exchange of Personal Health Record Content" -- describes the content and format of summary information extracted from a PHR system for import into an EHR system, and visa versa



Accession Number A user-friendly identifier created by the Departmental System, which identifies an instance of a filler order or imaging service request. It may group one or more requested procedures.
Accountability The property that ensures that the actions of an entity may be traced uniquely to the entity
Aliquoter An automated device which aliquots a parent specimen into one or more child specimen.
Assertion A piece of data produced by a SAML authority regarding either an act of authentication performed on a subject, attribute information about the subject, or authorization data applying to the subject with respect to a specified resource. This Assertion is used in access control and audit trails.
Attestation Attestation is a personal assertion of the truth of the statement to which you are attesting.


Battery A set of one or more observations identified as by a single name and code, treated as a shorthand unit for ordering or retrieving results of the constituent observations. A battery can be a single observation, but also a superset of batteries
Battery One or more laboratory tests, identified by a single name that can be ordered to a laboratory. For example: « Serum electrolyte » is a battery that usually comprises the tests for sodium, potassium, chloride and bicarbonate ions and that can be ordered to a chemistry laboratory on a blood serum specimen. Potassium can be ordered individually, and therefore is also represented by the term battery.


Care Context The participations surrounding the care provision act, and the attributes of that act. Everything in the document header. Data history, links to clinical reasoning.
Care Delivery Organization/Enterprise An organization that provides medical services at one or more physical locations
Centrifuge An automated device which takes off the cap of the specimen container.
Clinical Affinity Domain A group of healthcare enterprises that have agreed to work together using a common set of policies and which share a common infrastructure of repositories and a registry.
Clinical expert The person who assumes the overall responsibility for the clinical validation and reporting of an order or a part of it. HL7 speaks of "Result principal interpreter". Some countries speak of "pathologist"; others use the term "biologist".
Clinical validation The process through which a clinical expert accepts and interprets the results (observations) produced by the laboratory in respect of an order. Interpretation of the results is performed, considering the content of the whole order, together with the biological history, clinical and therapy information known to the clinical expert for the patient. Some countries speak of "biological validation". This step may sometimes be performed by an expert system that uses knowledge based rules and reasoning to interpret the most simple or routine cases. This step of validation is in any case under the laboratory's responsibility as distinct from the diagnosis and treatment performed by the physician who initially prescribed the order.
Code set a code set is any set of codes used for encoding data elements, such as tables of terms, medical concepts, medical diagnosis codes, or medical procedure codes. An example of international code set is LOINCTM (Logical Observation Identifier Names and Codes)
Context Management Registry An HTTP technology specific service defined by the HL7 Context Management CCOW Standard to locate an instance of a context manager servicing a specific desktop.
Context Session A collection of participant applications that are sharing context on one or more subjects.
Conveyor An automated device which transports specimen to the appropriate devices.


Decaper An automated device which takes off the cap of the specimen container.
Digital Signature A legally useful electronic equivalent to facsimile signature, including signatures generated for a variety of entities including human and machine sources. Based on digital certificates attributable to well-known healthcare oriented certificate authorities; incorporating cryptographically secure techniques for signature generation and validation.
Dilution System An automated device which dilutes a specimen by mixing a diluent.
Directory A book containing the names and residences of the inhabitants of any place, or of classes of them; an address book; as, a business directory.
Disposition The manner in which the referenced instances are to be disposed of, their intended use.


Encounter An interaction between a patient and care provider(s) for the purpose of providing healthcare-related service(s). Healthcare services include health assessment. Examples: outpatient visit to multiple departments, home health support (including physical therapy), inpatient hospital stay, emergency room visit, field visit (e.g., traffic accident), office visit, occupational therapy, telephone call.
Estimated Time of Arrival The time the patient being referred can be expected to arrive in the emergency department.
Evidence Documents Evidence Documents represent the uninterpreted information that is primarily managed and used inside the imaging department, although distribution outside the imaging department is not precluded. Evidence documents are non-image information and include things such as measurements, CAD results, procedure logs, etc and are to be encoded as DICOM SR documents.
Evidence Objects All objects generated as a result of performing procedure steps on systems in an imaging department. These objects are used by the reading physician in the process of creating a diagnostic report and are managed inside the imaging Department. Examples of evidence objects include: Images, Presentation States, Key Image Notes and Evidence Documents.


Federated Identity A user s identity is said to be federated between a set of Providers when there is an agreement between the providers on a set of identifiers and/or attributes to use to refer to the user.
Federation This term is used in two senses in SAML: The act of establishing a relationship between two entities. An association comprising any number of service providers and identity providers.
Filler order The order generated by the actor Order Filler on behalf of a placer order received from the actor Order Placer. A filler order may also be directly created by the actor Order Filler, as described in the use case "Filler ordering".
Foreign Key (FK) A database key that is used as a reference to relate one entity to another entity. It may be a unique value, or used in conjunction with another Foreign Key to create a unique value.
Functional Role Role an individual is acting under when they are executing a function. See ISO 21298


Globally Unique Identifier An identifier of an entity, such as persistent document, that has been generated by an algorithm guaranteeing its global uniqueness.


Hash A value uniquely calculated by using a well-known algorithm to create a digest all of the data constituting an electronic record. An actor uses a private key to generate a digital signature by transforming this value. By recalculating the hash digest value, and using the actor's certificate's public key to transform the electronic signature, it is possible to attest to the actor's signing ceremony and to the integrity of the signed record.


Identity Provider A type of service provider that creates, maintains, and manages identity information for users and provides user authentication to other service providers within a federation, such as with web browser profiles.
Images Available A transaction or transactions used to determine that images have been stored in an image archive and may be retrieved.
inetOrgPerson The inetOrgPerson [RFC 2798] object class is a general purpose object class that holds attributes about people. The attributes it holds were chosen to accommodate information requirements found in typical Internet and Intranet directory service deployments. The inetOrgPerson object class is designed to be used within directory services based on the LDAP v3 [RFC 2251] and the X.500 family of protocols, and it should be useful in other contexts as well.
Integrity The property of the data has not been altered, or destroyed in an unauthorized manner.e



Key Distribution Center The Kerberos server that issues Ticket Granting Tickets and service tickets. See RFC1510.


Labeler An automated device which affixes the bar code label to the specimen container.
Local Authentication In the ATNA profile the term local authentication means that the user identification, authentication, and authorization method is chosen by the local system administration and does not necessarily comply with any IHE profile. It may be a local username password system, a secure token system, or any other system that is considered acceptable by the local security administration.


Manifest Document A Manifest Document is an instance of DICOM Key Object Selection SOP Class, which describes and collects a set of DICOM SOP Instances that are intended for sharing.
Master File a common reference file used by one or more application systems. A code set can be considered as a master file
Movement A Movement is an event describing a change of the situation of the patient in the context of the encounter. This concept encompasses changes such as transfers of patient location, change of patient class, new attending doctor, new consulting doctor, new encounter starting, encounter closing, etc. The concept of Movement is a superset of the concept of "Transfer".


Non-repudiation This service provides proof of the integrity and origin of data which can be verified by any party.


Observation A measurement of a single variable or a single value derived logically and/or algebraically from other measured or derived values. A test result is an observation


Patient (When used in the context of ATNA) RFC-XXXX defines the means of identifying the person who is a patient. The patient information in audit event records corresponds to the information available to identify a patient at the time the audit record was generated, and does not reflect later updates (e.g. patient reconciliation).
Patient Identifier Cross-reference Domain Consists of a set of Patient Identifier Domains known and managed by a Patient Identifier Cross-reference Manager Actor. The Patient Identifier Cross-reference Manager Actor is responsible for providing lists of alias identifiers from different Patient Identifier Domains.
Patient Identifier Domain A single system or a set of interconnected systems that all share a common identification scheme for patients. Such a scheme includes (1) a single identifier-issuing authority, (2) an assignment process of an identifier to a patient, (3) a permanent record of issued patient identifiers with associated traits, and (4) a maintenance process over time. The goal of Patient Identification is to reduce errors.
Patient Mapping Agent The CCOW defined component that provides for the mapping of patient identifiers across disparate patient identity domains.
Patient Privacy Consent The act of a patient consenting to a specific Privacy Consent Policy.
Patient Privacy Consent Document A document that follows the BPPC profile and captures the act of the patient consenting to a specific XDS Affinity Domain defined Privacy Consent Policy.
Patient Subject The PSA defined subject that supports sharing the currently selected patient identifier amongst disparate applications running on the desktop.
PatientID (When used in the context of ATNA) A free text that holds the system-internal patient identifier being unique within that system domain. The patient identifier domain is that assigned to the system that generated the audit event record. The patient information in audit event records corresponds to the information available to identify a patient at the time the audit record was generated, and does not reflect later updates (e.g. patient reconciliation).
Placer order The order created and handled by the actor Order Placer.
Point of Service (POS) Application An application used by physicians to access patient information and perform work. Examples of a POS include EMR, EHR, physician practice system, PACS, etc.
Pre-fetch The activity of fetching images or other information objects from previously completed procedures to near-term storage for review of those data.
Privacy Consent Policy One of the acceptable-use Privacy Consent Policies that are agreed to and understood in the Affinity Domain.
Privacy Consent Policy Act Identifier An Affinity Domain assigned identifier that uniquely defines the act of a patient consenting to a specific Affinity Domain Privacy Consent Policy.
Privacy Consent Policy Identifier An Affinity Domain assigned identifier (OID) that uniquely identifies the Affinity Domain Privacy Consent Policy. There is one unique identifier (OID) for each Privacy Consent Policy within the Affinity Domain.
Private key a key in an asymmetric cryptographic algorithm; the possession of this key is restricted, usually to one entity.e
Procedure In the context of a "Pre-procedure History and Physical," the "procedure" is a surgery or an invasive examination of a patient that is required by quality review organizations to be preceded by a pre-procedure assessment of procedure risk and anesthesia risk. This assessment is typically referred to as a "Pre-operative" or "Pre-procedure History and Physical."
Proposed disposition The intended disposition (i.e. admission to ICU, discharge to home, transfer to psychiatric hospital), if known, that the referring provider expects the patient will end up after the emergency department intervention.
Pseudonymize Replace identification with fictitious values.
Public Key a key in an asymmetric algorithm that is publicly available



Recaper An automated device which re-caps a specimen container.
Regional Health Information Network An implementation of an affinity domain serving a number of care delivery organizations in a region.


Secure Domain A network, hardware systems, secure nodes, and physical environment for which a single set of security policies is defined and enforced for access to its addressable objects.
Security Domain An environment defined by a single set of security policies, including a set of people, equipment, facilities, procedures. A Security Domain may be a single enterprise or a collection of enterprises (e.g. IHE-XDS Affinity Domain).
sig. A Latin abbreviation for signetur used to represent the instruction following the medication name.
Signature ceremony an instance of an entity creating a digital signature document.
Signature purpose an indication of the reason an entity signs a document. This may be explictly included as part of the signed information and can be used when determining accountability for various actions concerning the document. Examples include author, transcriptionist/recorder, and witness.
Signature time the date and time of a signature ceremony.
Sorter An automated device which sorts the specimen according to their process type.
Specimen Storage System An automated storage device which saves and manages processed specimen.
Structural Role Role of an individual within an organization. See ISO 21298
Submission Set A set of XDS documents registered together to a Document Repository concerning information related to one care event of a single patient, provided by an EHR system.


Technical validation The process through which a laboratory technician accepts a single observation or a set of observations that have been produced either with a manual technique or an automated one, generally under his control. Technical validation ensures that results/observations have been arrived at in conformance with defined laboratory procedures and have satisfied quality control and other technical validation criteria.
Test a medical procedure that involves testing a sample of blood, urine, or other substance from the body
Ticket Granting Ticket The initial credentials that verify that the user has been authenticated. It is used to avoid repeated user authentication events and as a token to request access to services.icket Granting Ticket. The initial credentials that verify that the user has been authenticated. It is used to avoid repeated user authentication events and as a token to request access to services.
Transport Mode The method the patient employs, or is provided to get to the emergency department.


Unique Identifier See Globally Unique Identifier
Universal Coordinated Time The reference time base that is internationally recognized and supported. This is the replacement for GMT.
Universal ID Unique identifier over time within the UID type. Each UID must belong to one of specifically enumerated species. Universal ID must follow syntactic rules of its scheme.
User A natural person who makes use of a system and its resources for any purpose. A more generalized term principal is used in SAML. For the purpose of XUA the SAML use of principal should be considered equal to XUA use of user.
User Subject The PSA defined subject that supports sharing the user identity of the currently logged in to the applications on the desktop.
Username A sequence of characters, different from a password, that is used as identification and is required when logging on to a multiuser computer system, LAN, bulletin board system, or online service. Also called user ID, or uid.


Visit A visit applies to both admitted and non-admitted patients, it is identified by a unique enterprise-wide visit number, and it enables the administrative recording for all acts performed for this patient during his/her stay in the Hospital. For France refer to Volume 4 of Radiology Technical Framework entitled "National Extension for IHE France".


Web-Viewable Browsable using a web browser (e.g., XHTML files and JPEG images)
Wet Signature Ink on paper signature.
Work order A sub-set of batteries and tests extracted from the filler order, and submitted by the actor Order Filler to an actor Automation Manager for processing.


XDS Document An XDS Document is the smallest unit of information that may be provided to a Document Repository and registered in a Document Registry. An XDS Document may contain simple text, formatted text (e.g. HL7 CDA Release 1), images (e.g. DICOM) or structured and vocabulary coded clinical information (e.g. CDA Release 2, CCR), or may be made up of a mixture of the above types of content.
XDS Folder An XDS Folder allows document sources to group the documents they submit with other related documents. What constitutes a Folder and the vocabulary associated with the specific Folders used by an EHR-CR is decided by an agreement between the care delivery organization members of a Clinical Affinity Domain.