871638006: Hypertrophic cardiomyopathy due to glycogen storage disease (disorder)

SNOMED CT Concept\Clinical finding (finding)\...

\Viscus structure finding (finding)\Cardiac finding\...

\Myocardial finding\Myocardial disease\Cardiomyopathy\...

\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease

\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease

\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease

\Finding of trunk structure\Finding of upper trunk (finding)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Myocardial finding\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Myocardial finding\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Myocardial finding\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Cardiac finding\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Disorder of mediastinum (disorder)\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Mediastinal finding\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Finding of upper trunk (finding)\Finding of region of thorax\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Finding of trunk structure\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease

\Cardiovascular finding\Cardiac finding\Myocardial finding\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Cardiac finding\Myocardial finding\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Cardiac finding\Myocardial finding\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Cardiac finding\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Cardiac finding\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Cardiac finding\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Cardiac finding\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Cardiac finding\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Cardiac finding\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Disorder of cardiovascular system (disorder)\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Disorder of cardiovascular system (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Disorder of cardiovascular system (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Disorder of cardiovascular system (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Disorder of cardiovascular system (disorder)\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Cardiovascular finding\Disorder of cardiovascular system (disorder)\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease

\Disease\Disorder of body system\Disorder of cardiovascular system (disorder)\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of cardiovascular system (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of cardiovascular system (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of cardiovascular system (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of cardiovascular system (disorder)\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of cardiovascular system (disorder)\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of mediastinum (disorder)\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of body system\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Structural disorder of heart\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Hypertrophic cardiomyopathy\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Myocardial disease\Cardiomyopathy\Cardiomyopathy associated with another disorder (disorder)\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Hypertrophic cardiomyopathy due to disorder\Hypertrophic cardiomyopathy due to glycogen storage disease
\Disease\Disorder of trunk (disorder)\Disorder of thoracic segment of trunk\Disorder of thorax (disorder)\Disorder of mediastinum (disorder)\Heart disease\Cardiac complication\Cardiomyopathy due to storage disease\Hypertrophic cardiomyopathy due to glycogen storage disease

Status: current, Sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jul 2020. Module: SNOMED CT core

Descriptions:

Id Description Lang Type Status Case? Module

3973698012 Hypertrophic cardiomyopathy due to glycogen storage disease en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

3973699016 Glycogen storage disease with hypertrophic cardiomyopathy en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

3973700015 Hypertrophic cardiomyopathy due to glycogen storage disease (disorder) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core

2114811000172115 cardiomyopathie hypertrophique due à une maladie de stockage du glycogène fr Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) Belgian module (core metadata concept)

2114821000172113 hypertrofische cardiomyopathie door glycogeenstapelingsziekte nl Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) Belgian module (core metadata concept)

2114831000172111 hypertrofische cardiomyopathie als gevolg van glycogeenopslagziekte nl Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) Belgian module (core metadata concept)

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
Hypertrophic cardiomyopathy due to glycogen storage disease	Is a	Hypertrophic cardiomyopathy	false	Inferred relationship	Some
Hypertrophic cardiomyopathy due to glycogen storage disease	Is a	Cardiomyopathy due to storage disease	true	Inferred relationship	Some
Hypertrophic cardiomyopathy due to glycogen storage disease	Finding site	Myocardium structure	true	Inferred relationship	Some	1
Hypertrophic cardiomyopathy due to glycogen storage disease	Associated morphology	Hypertrophy	true	Inferred relationship	Some	1
Hypertrophic cardiomyopathy due to glycogen storage disease	Due to	Glycogen storage disease	true	Inferred relationship	Some	2
Hypertrophic cardiomyopathy due to glycogen storage disease	Is a	Hypertrophic cardiomyopathy due to disorder	true	Inferred relationship	Some

Inbound Relationships	Type	Active	Source	Characteristic	Refinability	Group
Muscle and heart glycogen synthase deficiency (disorder)	Is a	True	Hypertrophic cardiomyopathy due to glycogen storage disease	Inferred relationship	Some
Fatal congenital hypertrophic cardiomyopathy due to glycogen storage disease	Is a	True	Hypertrophic cardiomyopathy due to glycogen storage disease	Inferred relationship	Some

Reference Sets