# Logical Record Architecture for Health and Social Care
## Discharge Summary Release 0.02

Contents
The content of this release is not comprehensive and is not fully validated and must not be used in live system implementations.
# Reference Model Class: EHR_EXTRACT
This class represents the root node of an EHR Extract: of part or all of the health record information extracted from an EHR Provider system for the purposes of communication to an EHR Recipient (which might be another repository, a client application or a middleware service such as an electronic guideline component). ## Attributes
Name | Data type | Occurs | Description
--- | --- | --- | ---
ehr_system | II | 1..1 | The identity of the EHR Provider system from which this EHR Extract has been created.
ehr_id | II | 1..1 | The identity of the EHR from which this EHR Extract has been created. It shall be unique for that EHR Provider system for this subjectofcare.
subject_of_care | II | 1..1 | Unique identifier of the subject of care from whose EHR this EHR Extract was created, as defined by the EHR Provider system.
time_created | TS | 1..1 | The date and time at which data from this subject of care's EHR was queried or exported in order to create this EHR Extract.
authorising_party | II | 0..1 | Agent authorising the EHR Extract to be created and sent. This attribute is optional since some extracts might be created automatically between (authorised) interacting computing services.
rm_id | ST | 1..1 | The identity and version of the Reference Model standard under which this EHR_EXTRACT was made. For an EHR Extract conforming to this standard the attribute will have the string value "EN13606".
## Relationships
Name | Class | Occurs | Description
--- | --- | --- | ---
criteria | EXTRACT_CRITERIA | 0..* | The set of criteria by which the EHR of the subject of care was queried or filtered in order to generate this EHR_EXTRACT. These might not correspond directly to the criteria supplied in an EHR_EXTRACT Request.
## Constraints
Type | Name | Specification
--- | --- | ---
rm_id is 13606 | Invariant | inv: rm_id.value = 'EN 13606'