In cases where the values of the desired XLink attributes are unchanging across individual instances in all the documents of a certain type, attribute value defaults fixed or not may be added to a DTD or schema so that the attributes do not have to appear physically on element start-tags. For example, if attribute defaults were provided for the xmlns: Note, however, that parsers are not required to process the external subset. Applications, such as web browsers, that do not process the external subset will not be aware of any default values identified therein.
GEHR Australia produced a proof of concept implementation in which clinical archetypes were developed and used. Relationship to other Health Information Models Where relevant, the correspondences to other information models have been documented in this specification.
The following sections summarise the other models and standards with which correspondences are shown. Since Januarythe prEN prestandard has been the subject of significant revision, as part of its transition to a full European Standard "EN".
This work has been influenced by the openEHR specifications, and has itself been a source of further insights and changes to the openEHR specifications. Particular areas of openEHR which have been changed due to this process include: Implementation experience with Release 0.
Firstly, its scope includes systems, while EN defines an EHR Extract; secondly, EN suffers somewhat from "design by committee", and has no formal validation mechanism for its models.
HL7 Version 3 Correspondences to some parts of HL7 version 3 ballot 5, July are also documented where possible, however, it should be understood that there are a number of difficulties with this.
In fact, it differs from the information model presented here and for that matter most published information models in two basic respects: As a consequence, data in messages are not instances of HL7v3 RIM classes, as would be the case in other systems based on information models of the kind presented here.
Despite the differences, there are some areas that appear to be candidates for mapping, specifically the data types and terminology use, and the correspondence between openEHR Compositions and parts of the HL7 Clinical Document Architecture CDA.
However, the computational viewpoint i.
EHR Packages The packages are as follows: This package contains the generic structures for recording clinical statements. The figure below illustrates an overview of the class structure of the EHR Information Model, along with the main concepts on which they rely, namely Data Types, Data Structures, Archetyped, and Identification.
A central EHR object identified by an EHR id specifies references to a number of types of structured, versioned information, plus a list of Contribution objects that act as audits of change-sets made to the EHR.
The ehr package is illustrated in the figure rm. The classes have a more or less one-to-one correspondence with the objects shown in figure High-level EHR structure. The Parts of the EHR 4. Otherwise, it simply acts as an access point for the component parts of the EHR.
Because security models for health information are still in their infancy, the openEHR model adopts a completely flexible approach. The first is the name of the security scheme currently in use, while the second settings attribute is an object containing the access settings for the EHR according to that particular scheme.
The former are used to indicate who is currently understood to be the subject of the record, and whether the EHR is actively in use, inactive, and whether it should be considered queryable.
1 Introduction. This specification defines the XML Linking Language (XLink), which allows elements to be inserted into XML documents in order to create and describe links between resources.. XLink provides a framework for creating both basic unidirectional links and more complex linking structures. Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for. This specification defines the XML Linking Language (XLink) Version , which allows elements to be inserted into XML documents in order to create and describe links between resources. It uses XML syntax to create structures that can describe links similar to the simple unidirectional hyperlinks of.
The subject is included in the EHR Status object because it can change, due to errors being discovered in the allocation of records to patients. If the anonymous form is used, the change will be made elsewhere in a cross-reference table; otherwise the EHR Status object will be updated.
Because it is versioned, all such changes are audit-trailed, and the change history can be reconstructed. Other EHR-wide meta-data may be recorded in the archetyped part of this object, including runtime environment settings, software application names and version ids, identification and versions of data resources such as terminologies and possibly even actual software tools, configuration files, keys and so on.
Such information is commonly versioned in software configuration management systems, in order to enable the reconstruction of earlier versions of software with the correct tools. One reason to store such information at all is that it adds to medico-legal support when clinicians have to justify a seemingly bad decision: The Transaction concept was later been renamed to "Composition", which is the name of the equivalent concept in the current CEN EN, and it has been expanded and more formally defined in openEHR in two ways.
Secondly, the informational purpose of a Composition is no longer just to contain data from a passing clinical event such as a patient contact, but also to capture particular categories of clinical data which have long-lived significance, such as problem and medication lists.
Experience with health information systems, including the GEHR Australia project, SynEx, Synapses, and inspection of common commercial systems, has shown that there are two general categories of information at the coarse level which are found in an EHR: Event Compositions Events record what happens during healthcare system events with or for the patient, such as patient contacts, but also sessions in which the patient is not a participant e.
The figure below illustrates a simple EHR comprising an accumulation of event Compositions. Basic event-oriented EHR An important job of the event Composition is to record not only the data from the healthcare event, such as observations on the patient, but also to record the event context information, i.
For this reason, a specific class representing clinical context is associated with event compositions in the formal model.
Persistent Compositions In a more sophisticated EHR, there is also a need to record items of long-term interest in the record.
These are often separated by clinicians into well-known categories, such as:Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.
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1 Introduction. This specification defines the XML Linking Language (XLink), which allows elements to be inserted into XML documents in order to create and describe links between resources.. XLink provides a framework for creating both basic unidirectional links and more complex linking structures.
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