Profile Comparison between http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-screening-assessment vs http://hl7.org/fhir/us/bser/StructureDefinition/BSeR-EducationLevel

Left:US Core Observation Screening Assessment Profile (http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-screening-assessment)
Right:BSeR Education Level (http://hl7.org/fhir/us/bser/StructureDefinition/BSeR-EducationLevel)

Messages

ErrorStructureDefinition.urlValues for url differ: 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-screening-assessment' vs 'http://hl7.org/fhir/us/bser/StructureDefinition/BSeR-EducationLevel'
ErrorStructureDefinition.versionValues for version differ: '6.0.0-ballot' vs '2.0.0-connectathon'
InformationStructureDefinition.nameValues for name differ: 'USCoreObservationScreeningAssessmentProfile' vs 'BSeR_EducationLevel'
InformationStructureDefinition.titleValues for title differ: 'US Core Observation Screening Assessment Profile' vs 'BSeR Education Level'
InformationStructureDefinition.dateValues for date differ: '2022-04-20' vs '2023-04-13T06:59:07+00:00'
InformationStructureDefinition.publisherValues for publisher differ: 'HL7 International - Cross-Group Projects' vs 'HL7 Public Health Work Group (http://www.hl7.org/Special/committees/pher/index.cfm)'
ErrorStructureDefinition.baseDefinitionValues for baseDefinition differ: 'http://hl7.org/fhir/StructureDefinition/Observation' vs 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-social-history'
WarningObservationElements differ in short: 'Survey Observation' vs 'assessment observation'
WarningObservation.codeElements differ in short: 'Type of observation (code / type)' vs 'Highest level of education'
InformationObservation.codeExample/preferred bindings differ at Observation.code using binding from USCoreObservationScreeningAssessmentProfile
WarningObservation.value[x]Elements differ in comments: 'An observation may have a value if it represents an individual survey, screening, or assessment question and answer pair. An observation should not have a value if it represents a multi-question or multi-select “check all that apply” responses. If a value is present, the datatype for this element should be determined by Observation.code. A CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the Observation.code defines a coded value.' vs 'An observation may have; 1) a single value here, 2) both a value and a set of related or component values, or 3) only a set of related or component values. If a value is present, the datatype for this element should be determined by Observation.code. A CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the Observation.code defines a coded value. For additional guidance, see the [Notes section] below.'
InformationObservation.value[x]Element minimum cardinalities differ: '0' vs '1'
WarningObservation.dataAbsentReasonElements differ in comments: ''Null' or exceptional values can be represented two ways in FHIR Observations. One way is to simply include them in the value set and represent the exceptions in the value. The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values. For a given LOINC question, if the LOINC answer list includes concepts such as 'unknown' or 'not available', they should be used for Observation.value. Where these concepts are not part of the value set for Observation.value, the Observation.dataAbsentReason can be used if necessary and appropriate.' vs 'Null or exceptional values can be represented two ways in FHIR Observations. One way is to simply include them in the value set and represent the exceptions in the value. For example, measurement values for a serology test could be 'detected', 'not detected', 'inconclusive', or 'specimen unsatisfactory'. The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values. For example, the dataAbsentReason code 'error' could be used when the measurement was not completed. Note that an observation may only be reported if there are values to report. For example differential cell counts values may be reported only when > 0. Because of these options, use-case agreements are required to interpret general observations for null or exceptional values.'
WarningObservation.dataAbsentReasonElements differ in definition for mustSupport: 'true' vs 'false'
WarningObservation.hasMemberElements differ in short: 'Reference to panel or multi-select responses' vs 'Related resource that belongs to the Observation group'
WarningObservation.hasMemberElements differ in definition: 'Aggregate set of Observations that represent question answer pairs for both multi-question surveys, screenings, and assessments and multi-select questions.' vs 'This observation is a group observation (e.g. a battery, a panel of tests, a set of vital sign measurements) that includes the target as a member of the group.'
WarningObservation.hasMemberElements differ in comments: 'This grouping element is used to represent surveys, screenings, and assessments that group several questions together or individual questions with “check all that apply” responses. For example in the simplest case a flat multi-question survey where the 'panel' observation is the survey instrument itself and instead of an `Observation.value` the `hasMember` element references other Observation that represent the individual questions answer pairs. When there is a heirarchical grouping of questions, the observation 'panels' can be nested. Because surveys, screenings, and assessments can be arbitrarily complex structurally, not all structures can be represented using this Observation grouping pattern.' vs 'When using this element, an observation will typically have either a value or a set of related resources, although both may be present in some cases. For a discussion on the ways Observations can assembled in groups together, see [Notes] below. Note that a system may calculate results from [QuestionnaireResponse] into a final score and represent the score as an Observation.'
WarningObservation.hasMemberElements differ in definition for mustSupport: 'true' vs 'false'
WarningObservation.derivedFromElements differ in short: 'Related Observation(s) or other resource the observation is made from' vs 'Related measurements the observation is made from'
WarningObservation.derivedFromElements differ in definition: 'Observations or or other resource such as a QuestionnaireResponse from which this observation value is derived.' vs 'The target resource that represents a measurement from which this observation value is derived. For example, a calculated anion gap or a fetal measurement based on an ultrasound image.'
WarningObservation.derivedFromElements differ in definition for mustSupport: 'true' vs 'false'
ErrorObservation.derivedFromType Mismatch: Reference([CanonicalType[http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-screening-assessment], CanonicalType[http://hl7.org/fhir/StructureDefinition/QuestionnaireResponse], CanonicalType[http://hl7.org/fhir/us/core/StructureDefinition/us-core-documentreference], CanonicalType[http://hl7.org/fhir/StructureDefinition/ImagingStudy], CanonicalType[http://hl7.org/fhir/StructureDefinition/Media], CanonicalType[http://hl7.org/fhir/StructureDefinition/MolecularSequence]]) vs Reference([CanonicalType[http://hl7.org/fhir/StructureDefinition/DocumentReference], CanonicalType[http://hl7.org/fhir/StructureDefinition/ImagingStudy], CanonicalType[http://hl7.org/fhir/StructureDefinition/Media], CanonicalType[http://hl7.org/fhir/StructureDefinition/QuestionnaireResponse], CanonicalType[http://hl7.org/fhir/StructureDefinition/Observation], CanonicalType[http://hl7.org/fhir/StructureDefinition/MolecularSequence]])

Metadata

NameValueComments
.abstractfalse
    .baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Observationhttp://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-social-history
    • Values Differ
    .copyrightUsed by permission of HL7 International, all rights reserved Creative Commons License
    • Removed the item 'Used by permission of HL7 International, all rights reserved Creative Commons License'
    .date2022-04-202023-04-13T06:59:07+00:00
    • Values Differ
    .descriptionThe US Core Observation Screening Assessment Profile meets the requirements of the US Core Data for Interoperability (USCDI) Assessments. To promote interoperability and adoption through common implementation, it sets the minimum expectations for the Observation Resource to record, search, and fetch observations representing the questions and responses to surveys and screening and assessment tools. For example, a social history status such as education or food insecurity or an assessment of the patient's cognitive, functional, or disability status. It can represent a single response, multiple responses, and multi-select "check all that apply" type questions. It identifies which core elements, extensions, vocabularies, and value sets **SHALL** be present in the resource when using this profile. It provides the floor for standards development for specific use cases.The highest level of education achieved by the patient. This is an optional demographic element of the patient included in all referral types.
    • Values Differ
    .experimental
      .fhirVersion4.0.1
        .jurisdiction
          ..jurisdiction[0]urn:iso:std:iso:3166#US
            .kindresource
              .nameUSCoreObservationScreeningAssessmentProfileBSeR_EducationLevel
              • Values Differ
              .publisherHL7 International - Cross-Group ProjectsHL7 Public Health Work Group (http://www.hl7.org/Special/committees/pher/index.cfm)
              • Values Differ
              .purpose
                .statusactive
                  .titleUS Core Observation Screening Assessment ProfileBSeR Education Level
                  • Values Differ
                  .typeObservation
                    .urlhttp://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-screening-assessmenthttp://hl7.org/fhir/us/bser/StructureDefinition/BSeR-EducationLevel
                    • Values Differ
                    .version6.0.0-ballot2.0.0-connectathon
                    • Values Differ

                    Structure

                    NameL FlagsL Card.L TypeL Description & ConstraintsR FlagsR Card.L TypeL Description & ConstraintsCommentsdoco
                    .. Observation C0..*ObservationSurvey Observation
                    us-core-2: If there is no component or hasMember element then either a value[x] or a data absent reason must be present
                    us-core-3: SHALL use UCUM for coded quantity units.
                    C0..*USCoreObservationSocialHistoryProfileassessment observation
                    • Elements differ in short: 'Survey Observation' vs 'assessment observation'
                    ... id Σ0..1idLogical id of this artifactΣ0..1idLogical id of this artifact
                      ... meta Σ0..1MetaMetadata about the resourceΣ0..1MetaMetadata about the resource
                        ... implicitRules ?!Σ0..1uriA set of rules under which this content was created?!Σ0..1uriA set of rules under which this content was created
                          ... language 0..1codeLanguage of the resource content
                          Binding: ?? (preferred): A human language.

                          Additional BindingsPurpose
                          ??Max Binding
                          0..1codeLanguage of the resource content
                          Binding: ?? (preferred): A human language.

                          Additional BindingsPurpose
                          ??Max Binding
                            ... text 0..1NarrativeText summary of the resource, for human interpretation0..1NarrativeText summary of the resource, for human interpretation
                              ... contained 0..*ResourceContained, inline Resources
                              0..*ResourceContained, inline Resources
                                ... extension 0..*ExtensionAdditional content defined by implementations
                                0..*ExtensionAdditional content defined by implementations
                                  ... modifierExtension ?!0..*ExtensionExtensions that cannot be ignored
                                  ?!0..*ExtensionExtensions that cannot be ignored
                                    ... identifier Σ0..*IdentifierBusiness Identifier for observation
                                    Σ0..*IdentifierBusiness Identifier for observation
                                      ... basedOn Σ0..*Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest)Fulfills plan, proposal or order
                                      Σ0..*Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest)Fulfills plan, proposal or order
                                        ... partOf Σ0..*Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy)Part of referenced event
                                        Σ0..*Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy)Part of referenced event
                                          ... status ?!SΣ1..1coderegistered | preliminary | final | amended +
                                          Binding: ?? (required): Codes providing the status of an observation.

                                          ?!SΣ1..1coderegistered | preliminary | final | amended +
                                          Binding: ?? (required): Codes providing the status of an observation.


                                          Required Pattern: final
                                            ... Slices for category S1..*CodeableConceptClassification of type of observation
                                            Slice: Unordered, Open by pattern:$this
                                            Binding: ?? (preferred): Codes for high level observation categories.


                                            S1..*CodeableConceptClassification of type of observation
                                            Slice: Unordered, Open by pattern:$this
                                            Binding: ?? (preferred): Codes for high level observation categories.


                                              ... code SΣ1..1CodeableConceptType of observation (code / type)
                                              Binding: ?? (preferred)
                                              SΣ1..1CodeableConceptHighest level of education
                                              Binding: ?? (preferred)
                                              Required Pattern: {"coding":[{"system":"http://loinc.org","code":"82589-3"}]}
                                              • Elements differ in short: 'Type of observation (code / type)' vs 'Highest level of education'
                                              • Example/preferred bindings differ at Observation.code using binding from USCoreObservationScreeningAssessmentProfile
                                              ... subject SΣ1..1Reference(US Core Patient Profile)Who and/or what the observation is aboutSΣ1..1Reference(US Core Patient Profile)Who and/or what the observation is about
                                                ... focus ΣTU0..*Reference(Resource)What the observation is about, when it is not about the subject of record
                                                ΣTU0..*Reference(Resource)What the observation is about, when it is not about the subject of record
                                                  ... encounter Σ0..1Reference(Encounter)Healthcare event during which this observation is madeΣ0..1Reference(Encounter)Healthcare event during which this observation is made
                                                    ... effective[x] SΣC0..1dateTime S, Period, Timing, instantClinically relevant time/time-period for observation
                                                    us-core-1: Datetime must be at least to day.
                                                    SΣC0..1dateTime S, Period, Timing, instantClinically relevant time/time-period for observation
                                                      ... issued Σ0..1instantDate/Time this version was made availableΣ0..1instantDate/Time this version was made available
                                                        ... performer SΣ0..*Reference(US Core Practitioner Profile S | US Core Organization Profile | US Core Patient Profile | PractitionerRole | US Core CareTeam Profile | US Core RelatedPerson Profile)Who is responsible for the observation
                                                        SΣ0..*Reference(US Core Practitioner Profile S | US Core Organization Profile | US Core Patient Profile | PractitionerRole | US Core CareTeam Profile | US Core RelatedPerson Profile)Who is responsible for the observation
                                                          ... value[x] SΣC0..1Quantity S, CodeableConcept S, string S, boolean, integer, Range, Ratio, SampledData, time, dateTime, PeriodActual resultSΣC1..1CodeableConceptActual result
                                                          Binding: ?? (extensible)
                                                          • Elements differ in comments: 'An observation may have a value if it represents an individual survey, screening, or assessment question and answer pair. An observation should not have a value if it represents a multi-question or multi-select “check all that apply” responses. If a value is present, the datatype for this element should be determined by Observation.code. A CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the Observation.code defines a coded value.' vs 'An observation may have; 1) a single value here, 2) both a value and a set of related or component values, or 3) only a set of related or component values. If a value is present, the datatype for this element should be determined by Observation.code. A CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the Observation.code defines a coded value. For additional guidance, see the [Notes section] below.'
                                                          • Element minimum cardinalities differ: '0' vs '1'
                                                          ... dataAbsentReason SC0..1CodeableConceptWhy the result is missing
                                                          Binding: ?? (extensible): Codes specifying why the result (Observation.value[x]) is missing.

                                                          C0..1CodeableConceptWhy the result is missing
                                                          Binding: ?? (extensible): Codes specifying why the result (Observation.value[x]) is missing.

                                                          • Elements differ in comments: '"Null" or exceptional values can be represented two ways in FHIR Observations. One way is to simply include them in the value set and represent the exceptions in the value. The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values. For a given LOINC question, if the LOINC answer list includes concepts such as 'unknown' or 'not available', they should be used for Observation.value. Where these concepts are not part of the value set for Observation.value, the Observation.dataAbsentReason can be used if necessary and appropriate.' vs 'Null or exceptional values can be represented two ways in FHIR Observations. One way is to simply include them in the value set and represent the exceptions in the value. For example, measurement values for a serology test could be "detected", "not detected", "inconclusive", or "specimen unsatisfactory". The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values. For example, the dataAbsentReason code "error" could be used when the measurement was not completed. Note that an observation may only be reported if there are values to report. For example differential cell counts values may be reported only when > 0. Because of these options, use-case agreements are required to interpret general observations for null or exceptional values.'
                                                          • Elements differ in definition for mustSupport: 'true' vs 'false'
                                                          ... interpretation 0..*CodeableConceptHigh, low, normal, etc.
                                                          Binding: ?? (extensible): Codes identifying interpretations of observations.


                                                          0..*CodeableConceptHigh, low, normal, etc.
                                                          Binding: ?? (extensible): Codes identifying interpretations of observations.


                                                            ... note 0..*AnnotationComments about the observation
                                                            0..*AnnotationComments about the observation
                                                              ... bodySite 0..1CodeableConceptObserved body part
                                                              Binding: ?? (example): Codes describing anatomical locations. May include laterality.

                                                              0..1CodeableConceptObserved body part
                                                              Binding: ?? (example): Codes describing anatomical locations. May include laterality.

                                                                ... method 0..1CodeableConceptHow it was done
                                                                Binding: ?? (example): Methods for simple observations.

                                                                0..1CodeableConceptHow it was done
                                                                Binding: ?? (example): Methods for simple observations.

                                                                  ... specimen 0..1Reference(Specimen)Specimen used for this observation0..1Reference(Specimen)Specimen used for this observation
                                                                    ... device 0..1Reference(Device | DeviceMetric)(Measurement) Device0..1Reference(Device | DeviceMetric)(Measurement) Device
                                                                      ... referenceRange C0..*BackboneElementProvides guide for interpretation
                                                                      C0..*BackboneElementProvides guide for interpretation
                                                                        .... id 0..1stringUnique id for inter-element referencing0..1stringUnique id for inter-element referencing
                                                                          .... extension 0..*ExtensionAdditional content defined by implementations
                                                                          0..*ExtensionAdditional content defined by implementations
                                                                            .... modifierExtension ?!Σ0..*ExtensionExtensions that cannot be ignored even if unrecognized
                                                                            ?!Σ0..*ExtensionExtensions that cannot be ignored even if unrecognized
                                                                              .... low C0..1??Low Range, if relevantC0..1??Low Range, if relevant
                                                                                .... high C0..1??High Range, if relevantC0..1??High Range, if relevant
                                                                                  .... type 0..1CodeableConceptReference range qualifier
                                                                                  Binding: ?? (preferred): Code for the meaning of a reference range.

                                                                                  0..1CodeableConceptReference range qualifier
                                                                                  Binding: ?? (preferred): Code for the meaning of a reference range.

                                                                                    .... appliesTo 0..*CodeableConceptReference range population
                                                                                    Binding: ?? (example): Codes identifying the population the reference range applies to.


                                                                                    0..*CodeableConceptReference range population
                                                                                    Binding: ?? (example): Codes identifying the population the reference range applies to.


                                                                                      .... age 0..1RangeApplicable age range, if relevant0..1RangeApplicable age range, if relevant
                                                                                        .... text 0..1stringText based reference range in an observation0..1stringText based reference range in an observation
                                                                                          ... hasMember SΣ0..*Reference(US Core Observation Screening Assessment Profile S | QuestionnaireResponse | MolecularSequence)Reference to panel or multi-select responses
                                                                                          Σ0..*Reference(Observation | QuestionnaireResponse | MolecularSequence)Related resource that belongs to the Observation group
                                                                                          • Elements differ in short: 'Reference to panel or multi-select responses' vs 'Related resource that belongs to the Observation group'
                                                                                          • Elements differ in definition: 'Aggregate set of Observations that represent question answer pairs for both multi-question surveys, screenings, and assessments and multi-select questions.' vs 'This observation is a group observation (e.g. a battery, a panel of tests, a set of vital sign measurements) that includes the target as a member of the group.'
                                                                                          • Elements differ in comments: 'This grouping element is used to represent surveys, screenings, and assessments that group several questions together or individual questions with “check all that apply” responses. For example in the simplest case a flat multi-question survey where the "panel" observation is the survey instrument itself and instead of an `Observation.value` the `hasMember` element references other Observation that represent the individual questions answer pairs. When there is a heirarchical grouping of questions, the observation "panels" can be nested. Because surveys, screenings, and assessments can be arbitrarily complex structurally, not all structures can be represented using this Observation grouping pattern.' vs 'When using this element, an observation will typically have either a value or a set of related resources, although both may be present in some cases. For a discussion on the ways Observations can assembled in groups together, see [Notes] below. Note that a system may calculate results from [QuestionnaireResponse] into a final score and represent the score as an Observation.'
                                                                                          • Elements differ in definition for mustSupport: 'true' vs 'false'
                                                                                          ... derivedFrom SΣ0..*Reference(US Core Observation Screening Assessment Profile S | QuestionnaireResponse | US Core DocumentReference Profile | ImagingStudy | Media | MolecularSequence)Related Observation(s) or other resource the observation is made from
                                                                                          Σ0..*Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence)Related measurements the observation is made from
                                                                                          • Elements differ in short: 'Related Observation(s) or other resource the observation is made from' vs 'Related measurements the observation is made from'
                                                                                          • Elements differ in definition: 'Observations or or other resource such as a QuestionnaireResponse from which this observation value is derived.' vs 'The target resource that represents a measurement from which this observation value is derived. For example, a calculated anion gap or a fetal measurement based on an ultrasound image.'
                                                                                          • Elements differ in definition for mustSupport: 'true' vs 'false'
                                                                                          • Type Mismatch: Reference([CanonicalType[http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-screening-assessment], CanonicalType[http://hl7.org/fhir/StructureDefinition/QuestionnaireResponse], CanonicalType[http://hl7.org/fhir/us/core/StructureDefinition/us-core-documentreference], CanonicalType[http://hl7.org/fhir/StructureDefinition/ImagingStudy], CanonicalType[http://hl7.org/fhir/StructureDefinition/Media], CanonicalType[http://hl7.org/fhir/StructureDefinition/MolecularSequence]]) vs Reference([CanonicalType[http://hl7.org/fhir/StructureDefinition/DocumentReference], CanonicalType[http://hl7.org/fhir/StructureDefinition/ImagingStudy], CanonicalType[http://hl7.org/fhir/StructureDefinition/Media], CanonicalType[http://hl7.org/fhir/StructureDefinition/QuestionnaireResponse], CanonicalType[http://hl7.org/fhir/StructureDefinition/Observation], CanonicalType[http://hl7.org/fhir/StructureDefinition/MolecularSequence]])
                                                                                          ... component Σ0..*BackboneElementComponent results
                                                                                          Σ0..*BackboneElementComponent results
                                                                                            .... id 0..1stringUnique id for inter-element referencing0..1stringUnique id for inter-element referencing
                                                                                              .... extension 0..*ExtensionAdditional content defined by implementations
                                                                                              0..*ExtensionAdditional content defined by implementations
                                                                                                .... modifierExtension ?!Σ0..*ExtensionExtensions that cannot be ignored even if unrecognized
                                                                                                ?!Σ0..*ExtensionExtensions that cannot be ignored even if unrecognized
                                                                                                  .... code Σ1..1CodeableConceptType of component observation (code / type)
                                                                                                  Binding: ?? (example): Codes identifying names of simple observations.

                                                                                                  Σ1..1CodeableConceptType of component observation (code / type)
                                                                                                  Binding: ?? (example): Codes identifying names of simple observations.

                                                                                                    .... value[x] Σ0..1Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, SampledData, time, dateTime, PeriodActual component resultΣ0..1Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, SampledData, time, dateTime, PeriodActual component result
                                                                                                      .... dataAbsentReason C0..1CodeableConceptWhy the component result is missing
                                                                                                      Binding: ?? (extensible): Codes specifying why the result (Observation.value[x]) is missing.

                                                                                                      C0..1CodeableConceptWhy the component result is missing
                                                                                                      Binding: ?? (extensible): Codes specifying why the result (Observation.value[x]) is missing.

                                                                                                        .... interpretation 0..*CodeableConceptHigh, low, normal, etc.
                                                                                                        Binding: ?? (extensible): Codes identifying interpretations of observations.


                                                                                                        0..*CodeableConceptHigh, low, normal, etc.
                                                                                                        Binding: ?? (extensible): Codes identifying interpretations of observations.


                                                                                                          .... referenceRange 0..*See referenceRange (Observation)Provides guide for interpretation of component result
                                                                                                          0..*See referenceRange (Observation)Provides guide for interpretation of component result

                                                                                                            doco Documentation for this format