This document summarizes a developer challenge from the National Center for Biomedical Ontology to enrich metadata for healthdata.gov datasets. It provides a 3 step process to capture dataset information, description, and controlled vocabularies used. Metadata for 373 datasets is made available through a SPARQL endpoint along with structural descriptions for 30 datasets and links to relevant medical terminologies and ontologies through NCBO BioPortal.

1. Healthdata.gov Metadata
Developer Challenge:
National Center for Biomedical Ontology
(NCBO)
Contact: Natasha Noy (noy@stanford.edu)
Stanford University
http://healthdata.bioontology.org

2. Step 1: Dataset information Example:
What is the dataset This dataset is published
by HHS, describes Part B
and where it comes
National Summary Data
from? File, covers the period
We capture information from Jan 1, 2000 to Dec
31, 2000, ...
about 373datasets
Example:
Step 2: Dataset description
This dataset describes allowed services, charges, and payments
What is in it? What for each HCPCS code and modifier
type of data does it
describe?
We describe the structure
of 30 datasets
Step 3: Controlled vocabulary Example:
Codes and modifiers are defined in the HCPCS (Healthcare Common
What are the terms Procedure Coding System) vocabulary
and codes in each
dataset?
We provide 28 medical
terminologies through
BioPortal, with mappings
to 320 others

3. Consensus Vocabularies Used
Dataset information
DBPedia Dataset description
Dublin Core Data Catalog vocabulary (DCAT)
Dublin Core terms Data Cube Vocabulary
SMDX SKOS
Controlled vocabularies
Healthcare Common Procedure Coding System (HCPC)
Current Procedural Terminology (CPT)
ICD-9 Procedure Codes
RxNorm
Access to 320 biomedical ontologies and terminologies

4. Representation Example
The dataset maps two dimensions,
HCPCS or CPT code and modifier,
to three measures: Number of services, HCPCS or CPT Code HCPCS codes
Allowed charges, Payment for services rdf:type: qb:codeList rdf:type:
qb:CodedProperty, skos:ConceptScheme
qb:DimensionProperty
qb:codeList
PartB National CPT codes
Summary data HCPCS or CPT rdf:type:
rdf:type: modifier skos:ConceptScheme
qb:Dataset, dcat:Dataset rdf:type:
qb:dimension qb:CodedProperty,
qb:DimensionProperty qb:codeList
qb:structure HCPCS modifiers
rdf:type:
qb:codeList skos:ConceptScheme
DSD Number of services
rdf:type: rdf:type:
qb:DataStructureDefinition qb:dimension qb:MeasureProperty CPT modifiers
rdf:type:
qb:component skos:ConceptScheme
qb:measure Allowed charges
rdf:type:
HCPCS/CPT Payments qb:measure qb:MeasureProperty
rdf:type:
qb:ComponentSpecfication qb:measure Payment for services
rdf:type:
qb:MeasureProperty

5. What we provide
• SPARQL Endpoint (http://healthdata.bioontology.org) containing
– Metadata for all 373 healthdata.gov datasets
– Structure descriptions for 30 datasets
– Links to consensus vocabularies
• Technical details and examples
(http://sites.google.com/healthdatancbo )
• NCBO BioPortal (http://bioportal.bioontology.org )
– Mapping links to more than 320 medical and biomedical
ontologies and controlled terminologies
– Value sets as subsets of controlled terminologies
• Open-source software components for enriching metadata and
linking value sets to controlled terminologies