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Document DSL

  • Document is schema for Questionnaire with questions and answers and types of values.
  • Document is used as source of meta-information by FormLayout
  • Document is used as source of meta-information by FormFinalize
  • Document resources stored in SDCDocument table.
  • Document can define computed fields via rules.

Marking schema as SDC Document entity

Document definition should be marked with aidbox.sdc/doc tag, and also tagged as zen/schema - because it's already schema.
MyDocument
{:zen/tags #{zen/schema aidbox.sdc/doc}}
And after that you can define your custom properties of the document and it's meta information (like source of the document)
Document source defined as fhir Coding like structure, with :system, :code and :url properties
MyDocument
{:zen/tags #{zen/schema aidbox.sdc/doc}
:source {:code "85353-1" :system "http://loinc.org"}}
To define document fields - you should add :type zen/map property and put your fields under :keys property.
MyDocument
{:zen/tags #{zen/schema aidbox.sdc/doc},
:type zen/map
:keys {:loinc-8310-5 {:text "Body temperature"
:type zen/map,
:confirms #{aidbox.sdc.fhir/quantity},
:sdc/boundaries {:imperial {:min 86, :max 105},
:metric {:min 30, :max 42}},
:units [{:name "°F"} {:name "°C"}]}}}
Every document field should confirms aidbox.sdc/super-field schema.
For details see Document fields definition section.

DB Storage & Common properties

To support document db-saving ability and support common fields for all documents such as:
  • :author - Reference to user which create document,
  • :encounter - Reference to encounter,
  • :unit-system - What unit system was used in this document at launch,
  • :patient - Reference to patient
  • :status - Status of the document,
  • :type - Full name of document profile.
  • :form - Name/version of form, with which document was captured
You need to add :confirms #{aidbox.sdc/Document} property
MyDocument
{:zen/tags #{zen/schema aidbox.sdc/doc}
:type zen/map
:confirms #{aidbox.sdc/Document}}

Rules

Rules used for computed properties. Properties schema and compute formula - defined separately.
To support rules definition you need to add tag aidbox.sdc/rules
MyDocument
{:zen/tags #{aidbox.sdc/doc zen/schema aidbox.sdc/rules}}
and after that you can define caclulated properties and their formulas under :sdc/rules property
MyDocument
{:zen/tags #{aidbox.sdc/dok zen/schema aidbox.sdc/rules},
:type zen/map
:sdc/rules {:loinc-39156-5 (when (and (get-in [:loinc-29463-7])
(get-in [:loinc-8302-2]))
(* (divide (* (get-in [:loinc-29463-7]) 703)
(* (get-in [:loinc-8302-2])
(get-in [:loinc-8302-2])))
1))},
:keys {:loinc-39156-5 {:type zen/number,
:text "BMI"}}}
  • name of the rule (:loinc-39156-5) should be matched with name of the field.
  • If sdc-type inference can't recognize field as calculated - you can mark it manually - add :sdc-type aidbox.sdc/calculated to it
When form launched - Rules from Document will be merged with rules from Layout and placed under :rules key in response.
Don't use same keys in Document rules and Layout rules
Rules logic defined via Embeddel lisp. See details in Lisp reference.
Aidbox Form UI has embedded lisp engine. If you use your custom ui - you should implement your lisp-engine, based on lisp reference.

Document Field definition

SDCDocument has several embedded field-types:
  • aidbox.sdc/text - fields with multiline text
  • aidbox.sdc/string - fields with oneline text
  • aidbox.sdc/number - fields with number
  • aidbox.sdc/quantity - fields with measurement units
  • aidbox.sdc/choice - fields with answers, located in valuesets
  • aidbox.sdc/reference - fields with reference to arbitrary resources
  • aidbox.sdc/calculated - fields, which need to be calculated via rules engine
  • aidbox.sdc/attachment - fields, that can be used to attach a file
This field types inferred from Document field schemas. But you can overwrite that by specifying it directly via :sdc-type key

super-field schema

Field-type definition.
Schema contains several aspects of Document (Field) lifecycle
  • how it stored in DB
  • how it validates
  • how it appeares in UI layout
  • what the possible options
  • what the source of the field
Can contain sub-fields or behaves like an array. Also has links to original sources of questions.
super-field schema has next keys:
property
description
filed-type
type
required?
text
Question text
all
string
yes
help
Question explanation or some hint - how to interpret it
all
string
no
type
zen/type of the value, which will be stored in DB
all
symbol
no
sdc-type
field meta-type - used for determine UI input type
all
symbol
no
confirms
additional schemas for stored value confirmation
all
set of symbols
no
sdc/default-value
Default field value (also for repeated fields)
all
zen/any
no
enum
List of available values
choice
zen/keyword
no
sdc/options
Alternative options source
choice
zen/keyword
no
units
List of units
quantity
vector of {:name string}
no
keys
When field is complex object(map) - used for defining nested fields
group
map of super-fields
no
every
When field is coll (zen/vector) - used for defining coll-item schema
repeated
super-field
no
sdc/boundaries
Min/max values for quantity fields (for different measurement units)
quantity
{:imperial MinMaxMap, :metric MinMaxMap}
no
last-change-datetime
Meta field - contains datetime of last changes
all
any
no
code
CodeSystem of the question (used in extractions)
all
Coding
no
linkId
Link to original questing (in questionnaire, used in converter to QR)
all
string
no
resourceType
resource table for quering data
reference
string
no

quantity field-type

Quantity contains units of measurement
quantity schema has next additional keys:
property
description
type
required?
units
List of units
vector of {:name string}
no
Example:
MyDocument
{:zen/tags #{aidbox.sdc/doc zen/schema}
:keys {:temp {:text "Body temperature"
:type zen/map,
:confirms #{aidbox.sdc.fhir/quantity},
:units [{:name "°F"} {:name "°C"}]}}}

choice field-type

Choise field has predefined set of answers.
Choice fields use these properties:
property
description
type
required?
:enum
List of available values
zen/vector of values
no
:sdc/options
Alternative options source
aidbox.sdc.options/{valueset,rpc}
no
By default choice field uses :enum keyword for options definition.
if you don't use :enum - you should confirm #{aidbox.sdc.fhir/coding} schema.
Example:
MyDocument
{:zen/tags #{zen/schema aidbox.sdc/doc},
:keys {:bp-measurement {:text "BP measurement site"
:confirms #{aidbox.sdc.fhir/coding} ;; <-- if you use :enum to enumerate possible values - this confirms is optional
:enum [{:value {:text "Biceps left",
:code "LA11158-5",
:system "http://loinc.org"}}
{:value {:text "Biceps right",
:code "LA11159-3",
:system "http://loinc.org"}}]}}}
For simple cases you can freely use :enum keyword with options - but for complex one (big datasets/more flexibility) you also have 2 alternative sources for retreiving them:
  • :aidbox.sdc.options/valueset use valuset stored in aidbox db
  • :aidbox.sdc.options/rpc - use custom rpc
It's better to use valuesets instead of :enum, they are more flexible for a long run. (ex: You will not have validation errors if change display of some value) you can add valuesets by using FTR
If you specify :sdc/options :aidbox.sdc.options/valueset, then you also must specify :valueset property.
property
description
type
required?
valueset
lisp expr that returns ValueSet ID
lisp-expr
yes
Example:
Static valueset
:sdc/options :aidbox.sdc.options/valueset
:valueset "my-food-allergy-valueset"
Dynamic valueset
:sdc/options :aidbox.sdc.options/valueset
:valueset (if (= (get :type) "food")
"my-food-allergy-valueset"
"my-substance-allergy-valueset")
If you specify :sdc/options :aidbox.sdc.options/rpc, then you also must specify :rpc property.
property
description
type
required?
valueset
ValueSet ID with list of choices
zen/string
yes
rpc
rpc method invocation description
zen/map
yes
RPC method invocations have next structure
property
description
type
required?
valueset
ValueSet ID with list of choices
zen/string
yes
method
rpc method name
zen/symbol
yes
params
parameters map
zen/map
yes
Each value of parameters-map should be valid lisp expression.
Example:
:sdc/options :aidbox.sdc.options/rpc
:rpc {:method my-ns/my-rpc
:params {:p1 (+ 1 2)
:p2 20}}

\

reference field-type

Reference field-type contains aidbox reference to resource (id + resourceType + display)
Also field has search semantics based on full resource text search.
To store reference - you should confirm aidbox.sdc.fhir/reference or zenbox/Reference schema.
reference fields should have these properties:
property
description
type
required?
resourceType
name of table to query data
string
no
Example:
MyDocument
{:zen/tags #{aidbox.sdc/doc zen/schema}
:keys {:patient {:text "Patient"
:type zen/map,
:confirms #{aidbox.sdc.fhir/reference},
:resourceType "Patient"}}}

calculated field-type

Calculated field. Rule with same name should be used to calculate the result.
Calculated fields don't provide additional keys. Instead it depends on :sdc/rules
NOTE: we have one restriction - calculated fields can't be in nested fields.
MyDocument
{:zen/tags #{zen/schema aidbox.sdc/doc aidbox.sdc/rules},
:keys {:height {...}
:weigth {...}
:bmi {:text "BMI",
:type zen/number}}
:sdc/rules {:bmi (divide (get :weigth)
(* (get :height)
(get :height)))}}

attachment field-type

Attachment field can be used to attach a file to document. File can be stored in DB or in cloud bucket (currently AWS S3 and GCP buckets are supported)
NOTE: We recommend storing files in the cloud, since storing files in the database takes too much space For cloud storage configuration read here
Example:
MyDocument
{:zen/tags #{aidbox.sdc/doc zen/schema}
:keys {:pulse-image {:confirms #{aidbox.sdc.fhir/attachment}
:sdc-type aidbox.sdc/attachment}}}
You can apply some constraints such as file type, max size:
MyDocument
{:zen/tags #{aidbox.sdc/doc zen/schema}
:keys {:pulse-image {:confirms #{aidbox.sdc.fhir/attachment}
:sdc-type aidbox.sdc/attachment
:type zen/map
:keys {:contentType {:type zen/string
:regex "image/*"}
:size {:type zen/integer
:max 100000}}}}}

QuestionnaireResponse convertions

If you need to convert SDCDocument to QuestionnaireResponse you need to specify additional field property
  • :linkId - linkId of original Questionnaire (if not given key of the question will be taken)
MyDocument
{:zen/tags #{zen/schema aidbox.sdc/doc},
:keys {:bmi {:text "BMI",
:type zen/number,
:linkId "/39156-5"}},
}

SDCDocument extraction

If you would like to extract some values to Observation you should specify additional field property:
  • :code - code/system of original Questionnaire question
MyDocument
{:zen/tags #{zen/schema aidbox.sdc/doc},
:keys {:bmi {:text "BMI",
:type zen/number,
:code [{:system "http://loinc.org" :code "39156-5"}]}},
}

Optional features

Store attachments in cloud storage

Aidbox Forms support storing attachments in the cloud.
Supported cloud storages:
  • AWS S3
  • GCP Cloud Storage
This feature can be configured via api-constructor in zen-project.
  1. 1.
    Configure your aidbox/system with sdc-service and it's configuration.
Example:
Your zen-project entrypoint namespace (box.edn for example)
box
{:zen/tags #{aidbox/system}
:zen/desc "test server"
:services {:sdc sdc-service}}
  1. 3.
    Configure sdc-service with created account resource and specify a bucket name
Example:
sdc-service
{:zen/tags #{aidbox/service}
:engine aidbox.sdc/service
:attachment {:bucket {:name "sdcattachments_bucket"
:account {:id "aws-account"
:resourceType "AwsAccount"}}}}
Last modified 10mo ago