Session 2 - Resources

Question 1

What are resources?

Answer 1

The building blocks that represent data and built using XML/JSON/RDF.
The smallest unit of exchange.

Question 2

What is another term for Resources?

Answer 2

The Content Model.

Question 3

What is an Observation resource?

Answer 3

Used for things that are measured.

Question 4

Names and Purpose of each Resource

Answer 4

Go to the FHIR website.

Question 5

Are Resources case sensitive?

Answer 5

Yes.

Question 6

What is cardinality?

Answer 6

Whether a resource is mandatory or not.

Min…Max
0…1
1…1
0…*
1…*

very rare to have 1…1, typically it is up to user to determine what is needed.

Question 7

XML vs JSON

Answer 7

XML has order/hierarchy. JSON has no hierarchy.

Question 8

What are flags?

Answer 8

Sigma = Is Summary = just the basics of resource
I = constraint
?! = modifying property
S = must support and defined by Profile
TU Trial Use
N Normative
D Draft

Question 9

What is Base Resource?

Answer 9

The most base level resource
Resource -> Domain Resource -> every other resource.
All FHIR resources inherit from base Resource

Question 10

What is binding?

Answer 10

The strength that an element binds to a value set.
Strengths can be required, extensible, example, etc

Question 11

What are value sets?

Answer 11

Link to coded values. Think ICD, genders, lists in general.
Resource elements bind to value sets, which bind to code systems
(Element -> value set -> code system)

Question 12

What is an extension?

Answer 12

A way to modify or add custom resource element.
Extensions are modified/added elements.

Question 13

What are data types

Answer 13

Primitive (single data/element) or complex (multiple elements)

Question 14

What are meta attribute examples?

Answer 14

Tags, profiles, security

Question 15

Is Modifer can do what to the resource?

Answer 15

It can change the meaning or interpretation of the resource

Question 16

What is Must Support

Answer 16

Doesn’t mean mandatory but must support it in some way. Cardinality defines mandatory or optional

Question 17

What is the Element Base Type

Answer 17

The basic Element data type, from which all elements are derived

Question 18

What is the backboneElement?

Answer 18

A specialization that adds modifierExtension

Question 19

Resource element to Value Set to CodeSystem

Answer 19

Resource element to Value Set to CodeSystem

Question 20

What is binding strength

Answer 20

Almost all elements that have codes are bound to their code systems — helps define if users own codes can be used, if codes can be modified, etc

Question 21

What are the 4 binding strengths?

Answer 21

Required - must be used
Extensible - must be used, but can be extended/modified
Preferred - should be used, but don’t have to be
Example - just FYI

Question 22

When creating your own codes, you should…

Answer 22

Create a new CodeSystem resource and list your codes there. Never just add codes to an existing/built-in CodeSystem

Question 23

Resource and elements are case sensitive?

Answer 23

True

Question 24

FHIR elements can never be empty?

Answer 24

True

Question 25

XML format requires that elements appear in the order documented?

Answer 25

True

Question 26

XML format requires that elements appear in the order documented?

Answer 26

True

Question 27

In JSON format, elements can appear in any order?

Answer 27

True

Question 28

Resource Heirarchy

Answer 28

Resource —> DomainResource and Bundle, Binary, Parameters —> All other resources All resources inherit from Domain Resource

Question 29

When a resource is updated on a server, the following steps occur

Answer 29

1. Merge existing and new tags 2. Replace existing profiles with new profiles 3. Merge existing security and new security labels

Question 30

What is the DomainResource?

Answer 30

Extends directly from base Resource All other resources inherit from it Can contain other resources

Question 31

What is the Narrative?

Answer 31

It is the text element of the DomainResource, that captures the human-readable summary information about the resource

Question 32

What is an extension?

Answer 32

Simply our own customer element. Very common in FHIR. Most common example is race/ethnicity in the Patient resource

Question 33

Extension vs ModifierExtension?

Answer 33

Extension can be ignored. ModifierExtension cannot be ignored. This is the same thing as extension but has a modifying property. Best to avoid use of these when possible.

Question 34

What are the general references between resources?

Answer 34

1. Literal reference: resource ID, URL 2. Logical reference: identifier

Question 35

What’s involved with validating a resource?

Answer 35

Check the structure, cardinality, values, coding, invariant, profiles, business rules tics Use one of the following validators tools (Schema, Schematron, StructureDefinition, Validator, ShEx) FHIR Validator is provided by the HL7 Spec. StructureDefinition: using profile is most powerful way to validate

Question 36

Review these Resources; know names, examples, purpose, and where to find them

Answer 36

http://hl7.org/fhir/resourceguide.html http://hl7.org/fhir/resourcelist.html