AC Method Model¶

Schema for AC (Analysis Concepts) method definitions. Covers statistical analysis methods (e.g., ANCOVA, Cox PH) and derivation methods (e.g., Subtraction, LOCF imputation). Methods are the reusable building blocks that AC and DC definitions reference.

URI: https://cdisc.org/ac/method

Name: ac_method

Schema Diagram¶

erDiagram
Any {

}
CategoricalVariable {
    string description  
    DataTypeEnum dataType  
    string inputType  
    string label  
    boolean multivalued  
    boolean required  
    string role  
}
Coding {
    string code  
    string display  
    uri system  
}
Configuration {
    string name  
    string description  
    DataTypeEnum dataType  
    stringList enumValues  
}
FactorLevel {
    string description  
    string name  
}
FactorLevelCombinationSpec {
    string description  
    string name  
}
Input {
    string description  
    DataTypeEnum dataType  
    string inputType  
    string label  
    boolean multivalued  
    boolean required  
    string role  
}
InputStatistic {
    string description  
    string role  
}
InputVariable {
    string description  
    DataTypeEnum dataType  
    string inputType  
    string label  
    boolean multivalued  
    boolean required  
    string role  
}
Method {
    string name  
    string description  
    string conceptId  
    string label  
    string methodType  
    string ncitCode  
}
ModelParameter {
    string description  
    string name  
}
ModelTerm {
    string description  
    string name  
}
OutputSpec {

}
Statistic {
    string name  
    string description  
    string conceptId  
    string label  
    string ncitCode  
}
StatisticSet {
    string name  
    string description  
    string conceptId  
    string label  
    string ncitCode  
}
StudyGroupPopulation {
    string description  
    string name  
}
SubMethod {
    string name  
    string description  
    string conceptId  
    string label  
    string methodType  
    string ncitCode  
}

CategoricalVariable ||--}o Coding : "codings"
CategoricalVariable ||--}o FactorLevel : "levels"
Configuration ||--|o Any : "defaultValue"
Configuration ||--}o SubMethod : "configuredSubMethods"
FactorLevel ||--}o Coding : "codings"
FactorLevelCombinationSpec ||--}o Coding : "codings"
FactorLevelCombinationSpec ||--}o FactorLevel : "combinedLevels"
FactorLevelCombinationSpec ||--}| CategoricalVariable : "factors"
Input ||--}o Coding : "codings"
InputStatistic ||--|| Statistic : "statisticId"
InputStatistic ||--|| SubMethod : "subMethodId"
InputVariable ||--}o Coding : "codings"
Method ||--|o OutputSpec : "output"
Method ||--}o Coding : "codings"
Method ||--}o Configuration : "configurations"
Method ||--}o Input : "inputs"
Method ||--}o SubMethod : "subMethods"
ModelParameter ||--|o FactorLevelCombinationSpec : "forFactorLevelCombination"
ModelParameter ||--}o Coding : "codings"
ModelParameter ||--}o FactorLevel : "forFactorLevels"
ModelParameter ||--}o InputVariable : "forInputVariables"
ModelTerm ||--}o Coding : "codings"
ModelTerm ||--}o Input : "forInputs"
ModelTerm ||--}| ModelParameter : "parameters"
OutputSpec ||--|o StudyGroupPopulation : "forStudyGroupPopulation"
OutputSpec ||--}o Coding : "codings"
OutputSpec ||--}o InputVariable : "forInputVariables"
OutputSpec ||--}o ModelParameter : "forModelParameters"
OutputSpec ||--}o ModelTerm : "forModelTerms"
OutputSpec ||--}o Statistic : "statistics"
OutputSpec ||--}o StatisticSet : "statisticSets"
Statistic ||--}o Coding : "codings"
StatisticSet ||--}o Coding : "codings"
StatisticSet ||--}o Statistic : "statistics"
StudyGroupPopulation ||--|| FactorLevelCombinationSpec : "factorLevelCombination"
StudyGroupPopulation ||--}o Coding : "codings"
SubMethod ||--|o OutputSpec : "output"
SubMethod ||--}o Coding : "codings"
SubMethod ||--}o Configuration : "configurations"
SubMethod ||--}o InputStatistic : "inputs"
SubMethod ||--}o SubMethod : "subMethods"

Classes¶

Class	Description
Any	Class defined to allow any value for a slot, used for flexible configuration ...
Coding	A reference to a code in a terminology or ontology
Configuration	A configurable parameter for a method
FactorLevel	A level of a categorical input variable (factor)
FactorLevelCombinationSpec	A combination of levels of one or more categorical input variables (factors)
FormulaSpec	Specifies the formula notation and text for a method
AggregationFormulaSpec	Specifies the formula notation and text for an aggregation method
DerivationFormulaSpec	Specifies the formula notation and text for a derivation method
ModelBasedFormulaSpec	Specifies the formula notation and text for a model-based method
Input	Specification of one input variable or value referenced by name in the formul...
InputValue	An input value that performs one of the roles defined in the formula for the ...
InputVariable	An input variable that performs one of the roles defined in the formula for t...
CategoricalVariable	An input variable that is categorical
ContinuousVariable	An input variable that is continuous (numeric)
InputStatistic	An input statistic that performs one of the roles defined in the formula for ...
Method	A reusable statistical or derivation method definition
AggregationMethod	A method that aggregates or summarizes data, such as mean, median, or sum
CompositeMethod	A method that is composed of multiple sub-methods
ModelBasedMethod	A method that is based on a statistical model, such as ANCOVA or Cox PH
DerivationMethod	A method that derives new variables from existing data, such as subtraction, ...
SubMethod	A method that is part of a composite method
ModelParameter	A parameter associated with a model term
ModelTerm	A term (variable) used in a statistical model
NameAsIdentifier	A mixin class for any named method component that is referenced by name
OutputSpec	A set of statistics produced by a method or sub-method that is associated wit...
Statistic	A reusable statistic/measure definition in the vocabulary
StatisticalModelSpec	A statistical model that describes the relationship between variables
StatisticSet	A predefined set of statistics produced by a method or sub-method
StudyGroupPopulation	A study group population that is denoted by a combination of input categorica...

Slots¶

Slot	Description
methodType	Indicates whether this is a model-based, aggregation or derivation method
formula	Formula specification including notation and expressions
configurations	Configurable parameters for the method
inputs	Input data specifications for roles defined in the formula for the method
output	Specification of the output of a single method or sub-method
statisticalModel	The statistical model associated with this method, if applicable
isModelFor	The input study design dependent variable that this model is intended to desc...
modelTerms	The terms (variables) used in the statistical model, if applicable
forInputs	The input study design independent variable(s) or value(s) that this model te...
parameters	The parameters associated with the model term
forModelTerms	The model term(s) with which the output is associated
forModelParameters	The model parameter(s) with which the output is associated
forInputVariables	The input variable(s) with which this model component is associated
forFactorLevels	The factor level(s) with which this model component is associated
forFactorLevelCombination	The factor level combination with which the model parameter is associated
factorLevelCombination	The combination of factor levels that denote the study group population
forStudyGroupPopulation	The study group population with which this model component is associated
subMethods	Sub-methods that are part of this method
notation	The formula notation system used
text	Template formula expression with role-tagged placeholders, e
inputType	The type of input, either a variable or a value
role	The role specified in the formula for the method that is performed by this in...
required	Indicates whether this input is mandatory
dataType	The data type of the input variable or value
multivalued	Indicates whether there can be multiple occurrences of the input
value	The value specified for the input value
levels	The levels of a categorical input variable (factor)
factors	The role(s) of the input categorical variable (factor) whose levels are combi...
combinedLevels	The factor levels that are combined in this factor level combination
subMethodId	The sub-method that produces the referenced output statistic
statisticId	The statistic produced by the referenced sub-method that performs the input r...
configuredSubMethods	The specific sub-method(s) that are configured by this configuration paramete...
defaultValue	Default value if not specified
enumValues	Allowed values for the configuration parameter or input value
conceptId	Unique identifier
name	Human-readable name
label	Short label for display
description	Free-text explanation or description
codings	Mappings to external terminology or ontology codes
ncitCode	NCIt code
system	URI identifying the coding system (e
code	The code value within the system (e
display	Human-readable label for the code
statistics	The statistics produced by this method, referencing the statistics vocabulary
statisticSets	The predefined set of statistics produced by this method, referencing the sta...

Enumerations¶

Enumeration	Description
ModelBasedFormulaNotation	The notation system used for model-based formulas
AggregationFormulaNotation	The notation system used for aggregation formulas
DerivationFormulaNotation	The notation system used for derivation formulas
DataTypeEnum	FHIR primitive data types for method inputs and outputs

Types¶

Type	Description
String	A character string
Integer	An integer
Boolean	A binary (true or false) value
Float	A real number that conforms to the xsd:float specification
Double	A real number that conforms to the xsd:double specification
Decimal	A real number with arbitrary precision that conforms to the xsd:decimal speci...
Time	A time object represents a (local) time of day, independent of any particular...
Date	a date (year, month and day) in an idealized calendar
Datetime	The combination of a date and time
DateOrDatetime	Either a date or a datetime
Uriorcurie	a URI or a CURIE
Curie	a compact URI
Uri	a complete URI
Ncname	Prefix part of CURIE
Objectidentifier	A URI or CURIE that represents an object in the model
Nodeidentifier	A URI, CURIE or BNODE that represents a node in a model
Jsonpointer	A string encoding a JSON Pointer
Jsonpath	A string encoding a JSON Path
Sparqlpath	A string encoding a SPARQL Property Path

Subsets¶

Subset	Description