The OPC Foundation specifies a ConformanceUnit as follows:

Each ConformanceUnit represents a specific set of features (e.g. a group of services, portions of services or information models) that can be tested as a single entity. ConformanceUnits are the building blocks of a Profile. Each ConformanceUnit can also be used as a test category. For each ConformanceUnit, there would be a number of TestCases that test the functionality described by the ConformanceUnit. The description of a ConformanceUnit is intended to provide enough information to illustrate the required functionality, but in many cases to obtain a complete understanding of the ConformanceUnit the reader may be required to also examine the appropriate part of OPC UA.

As well, the Profiles are specified:

A Profile is a named aggregation of ConformanceUnits and other Profiles. To support a Profile, an application has to support the ConformanceUnits and all aggregated Profiles. The definition of Profiles is an ongoing activity, in that it is expected that new Profiles will be added in the future. An OPC UA Application will typically support multiple Profiles. Multiple Profiles may include the same ConformanceUnit. Testing of a Profile consists of testing the individual ConformanceUnits that comprise the Profile.

Summarized: Profiles specify the feature set, which shall be supported by an OPC-UA application. Currently, the following Profiles will be supported:

Nano Embedded Device 2017 Server Profile
Micro Embedded Device 2017 Server Profile

Now all Profiles and ConformanceUnits belonging to these are summarized and explained corresponding to the definition of the OPC foundation.

Profiles

Micro Embedded Device 2017 Server Profile

Group	Conformance Unit/ Profile Tilte	Optional

Group	Conformance Unit/ Profile Tilte	Optional
Profile	Embedded DataChange Subscription Server Facet	no
Profile	Nano Embedded Device 2017 Server Profile	no
Session Services	Session Minimum 2 Parallel	no

Nano Embedded Device 2017 Server Profile

Group	Conformance Unit/ Profile Tilte	Optional

Group	Conformance Unit/ Profile Tilte	Optional
Profile	Core 2017 Server Facet	no
Profile	UA-TCP UA-SC UA-Binary	no
Base Information	Base Info Custom Type System	yes
Base Information	Base Info Diagnostics	yes

Embedded DataChange Subscription Server Facet

Group	Conformance Unit/ Profile Tilte	Optional

Group	Conformance Unit/ Profile Tilte	Optional
Monitored Item Services	Monitor Basic	no
Monitored Item Services	Monitor Items 2	no
Monitored Item Services	Monitor QueueSize_1	no
Monitored Item Services	Monitor Value Change	no
Subscription Services	Subscription Basic	no
Subscription Services	Subscription Minimum 1	no
Subscription Services	Subscription Publish Discard Policy	no
Subscription Services	Subscription Publish Min 02	no

Core 2017 Server Facet

Group	Conformance Unit/ Profile Tilte	Optional

Group	Conformance Unit/ Profile Tilte	Optional
Profile	SecurityPolicy – None	no
Profile	User Token – User Name Password Server Facet	no
Address Space Model	Address Space Atomicity	no
Address Space Model	Address Space Base	no
Address Space Model	Address Space Full Array Only	no
Attribute Services	Attribute Read	no
Attribute Services	Attribute Write Index	yes
Attribute Services	Attribute Write Values	yes
Base Information	Base Info Core Structure	no
Base Information	Base Info Estimated Return Time	yes
Base Information	Base Info OptionSet	yes
Base Information	Base Info Placeholder Modelling Rules	yes
Base Information	Base Info Selection List	yes
Base Information	Base Info Server Capabilities	yes
Base Information	Base Info ValueAsText	yes
Discovery Services	Discovery Find Servers Self	no
Discovery Services	Discovery Get Endpoints	no
Security	Security Administration	yes
Security	Security Role Server Authorization	yes
Session Services	Session Base	no
Session Services	Session General Service Behaviour	no
Session Services	Session Minimum 1	no
View Services	View Basic	no
View Services	View Minimum Continuation Point 01	no
View Services	View RegisterNodes	no
View Services	View TranslateBrowsePath	no

UA-TCP UA-SC UA-Binary

Group	Conformance Unit/ Profile Tilte	Optional

Group	Conformance Unit/ Profile Tilte	Optional
Protocol and Encoding	Protocol UA TCP	no
Protocol and Encoding	UA Binary Encoding	no
Protocol and Encoding	UA Secure Conversation	no

SecurityPolicy – None

Group	Conformance Unit/ Profile Tilte	Optional

Group	Conformance Unit/ Profile Tilte	Optional
Security	AsymmetricEncryptionAlgorithm_None	no
Security	AsymmetricSignatureAlgorithm_None	no
Security	KeyDerivationAlgorithm_None	no
Security	Security None CreateSession ActivateSession	no
Security	Security None CreateSession ActivateSession 1.0	yes
Security	SecurtyPolicy_None_Limits	no
Security	SymmetricEncryptionAlgorithm_None	no
Security	SymmetricSignatureAlgorithm_None	no

User Token – User Name Password Server Facet

Group	Conformance Unit/ Profile Tilte	Optional

Group	Conformance Unit/ Profile Tilte	Optional
Security	Security Invalid user token	no
Security	Security User Name Password	no

ConformanceUnits

Address Space Model

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Address Space Base	Support the NodeClasses with their Attributes and References as defined in Part 3. This includes for instance: Object, ObjectType, Variable, VariableType, References and DataType.	yes (Core 2017 Server Facet)
Address Space Atomicity	Support setting the NonatomicRead and NonatomicWrite flags in the AccessLevelEx Attribute for Variable Nodes to indicate whether Read or Write operations can be performed in atomic manner. If the flags are set to '1', atomicity cannot be assured.	yes (Core 2017 Server Facet)
Address Space Full Array Only	Support setting the WriteFullArrayOnly flag in the AccessLevelEx Attribute for Variable Nodes of non-scalar data types to indicate whether write operations for an array can be performed with an IndexRange.	yes (Core 2017 Server Facet)

Attribute Services

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Attribute Read	Supports the Read Service to read one or more Attributes of one or more Nodes. This includes support of the IndexRange parameter to read a single element or a range of elements when the Attribute value is an array.	yes (Core 2017 Server Facet)
Attribute Write Values	Supports writing to values to one or more Attributes of one or more Nodes.	no (optional in Core 2017 Server Facet)
Attribute Write Index	Supports the IndexRange to write a single element or a range of elements when the Attribute value is an array and partial updates is allowed for this array.	no (optional in Core 2017 Server Facet)

Base Information

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Base Info Core Structure	The Server supports the Server Object, ServerCapabilities and supports the OPC UA AddressSpace structure.	yes (Core 2017 Server Facet)
Base Info Custom Type System	The Server supports custom types (i.e. types that are derived from well-known ObjectTypes, VariableTypes, ReferenceTypes or DataTypes). Supporting this conformance unit requires that the custom types with their full inheritance tree are exposed in the AddressSpace.	no (optional in Nano Embedded Device 2017 Server Profile)
Base Info Server Capabilities	The Server supports publishing of the Server limitation in the ServerCapabilities, including MaxArrayLength, MaxStringLength, MaxNodePerRead, MaxNodesPerWrite, MaxNodesPerSubscription and MaxNodesPerBrowse.	no (optional in Core 2017 Server Facet)
Base Info Diagnostics	The Server supports the collection of diagnostic information. The EnabledFlag in the ServerDiagnostics Object can be set TRUE and in that case all static and dynamic Objects and Variables for diagnostic data as defined in UA Part 5 are supported.	no (optional in Nano Embedded Device 2017 Server Profile)
Base Info Estimated Return Time	Server supports the EstimatedReturnTime Property. It indicates the time at which the Server is expected to have a ServerStatus.State of RUNNING_0. Clients can use this information to govern the reconnect logic.	no (optional in Core 2017 Server Facet)
Base Info OptionSet	The Server supports the VariableType OptionSet.	no (optional in Core 2017 Server Facet)
Base Info Placeholder Modelling Rules	The Server supports defining custom Object or Variables that include the use of OptionalPlaceholder or MandatoryPlaceholder modelling rules.	no (optional in Core 2017 Server Facet)
Base Info ValueAsText	The Server supports the Property ValueAsText for enumerated DataTypes.	no (optional in Core 2017 Server Facet)
Base Info Selection List	The Server supports Variables of the SelectionListType VariableType.	no (optional in Core 2017 Server Facet)

Discovery Services

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Discovery Get Endpoints	Support the GetEndpoints Service to obtain all Endpoints of the Server. This includes filtering based on Profiles.	yes (Core 2017 Server Facet)
Discovery Find Servers Self	Support the FindServers Service only for itself.	yes (Core 2017 Server Facet)

Monitored Item Services

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Monitor Basic	Support the following MonitoredItem Services: CreateMonitoredItems, ModifyMonitoredItems, DeleteMonitoredItems and SetMonitoringMode.	yes (Embedded DataChange Subscription Server Facet)
Monitor Items 2	Support at least 2 MonitoredItems per Subscription where the size of each MonitoredItem is at least equal to size of Double.	yes (Embedded DataChange Subscription Server Facet)
Monitor QueueSize_1	This ConformanceUnit does not require queuing when multiple value changes occur during a "publish period". I.e. the latest change will be sent in the Notification.	yes (Embedded DataChange Subscription Server Facet)
Monitor Value Change	Support creation of MonitoredItems for Attribute value changes. This includes support of the IndexRange to select a single element or a range of elements when the Attribute value is an array.	yes (Embedded DataChange Subscription Server Facet)

Protocol and Encoding

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Protocol UA TCP	Support the UA TCP transport protocol as defined in UA Part 6.	yes (UA-TCP UA-SC UA-Binary)
UA Binary Encoding	Support UA Binary Encoding. Values of these data types are encoded in compact binary formats, contiguously and without tagging. I.e. the receiver is assumed to understand the structure it is decoding.	yes (UA-TCP UA-SC UA-Binary)
UA Secure Conversation	Support UA Secure Conversation specified in UA Part 6.	yes (UA-TCP UA-SC UA-Binary)

Security

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Security Administration	Allow configuration of the following Security related items (when they apply). select the allowed User identification policy or policies (e.g. User Name/Password or X509). enable/disable the security policy "None" or other security policies. enable/disable endpoints with MessageSecurityMode SIGN or SIGNANDENCRYPT. set the permitted certification authorities. define how to react to unknown Certificates. allow accepting any valid Certificate	no (optional in Core 2017 Server Facet)
Security Role Server Authorization	Restrict access based on the configured Roles and permissions.	no (optional in Core 2017 Server Facet)
Security None CreateSession ActivateSession	When SecurityPolicy=None, the CreateSession and ActivateSession service allow for a NULL/empty signature and do not require Application Certificates or a Nonce.	yes (SecurityPolicy – None)
Security None CreateSession ActivateSession 1.0	The Client can connect to Servers that require a certificate being passed on Session establishment. The Client in this case will first try without a certificate and if this fails present a certificate.	no (optional in SecurityPolicy – None)
Security User Name Password	A Client uses a User Name/Password combination. The token will be encrypted if required by the security policy of the User Token Policy or by the security policy of the endpoint. An unencrypted token either requires message encryption or means outside the scope of OPC UA to secure the identity token so that it cannot be retrieved by sniffing the communication. One option would be a secure transport like a VPN.	yes (User Token – User Name Password Server Facet)
Security Invalid user token	Servers shall take proper measures to protect against attacks on user identity tokens. Such an attack is assumed if repeated connection attempts with invalid user identity tokens happen. See ActivateSession Service in UA Part 4.	yes (User Token – User Name Password Server Facet)
AsymmetricEncryptionAlgorithm_None	This algorithm does not apply.	yes (SecurityPolicy – None)
AsymmetricSignatureAlgorithm_None	This algorithm does not apply.	yes (SecurityPolicy – None)
KeyDerivationAlgorithm_None	This algorithm does not apply.	yes (SecurityPolicy – None)
SymmetricEncryptionAlgorithm_None	This algorithm does not apply.	yes (SecurityPolicy – None)
SymmetricSignatureAlgorithm_None	This algorithm does not apply.	yes (SecurityPolicy – None)
SecurtyPolicy_None_Limits	DerivedSignatureKeyLength: 0	yes (SecurityPolicy – None)

Session Services

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Session General Service Behaviour	Implement basic Service behaviour. This includes in particular: checking the authentication token returning the requestHandle in responses returning available diagnostic information as requested with the 'returnDiagnostics' parameter respecting a timeoutHint	yes (Core 2017 Server Facet)
Session Base	Support the Session Service Set (CreateSession, ActivateSession, CloseSession) except the use of ActivateSession to change the Session user. This includes correct handling of all parameters that are provided. Note that for the CreateSession and ActivateSession services, if the SecurityMode = None then: The Application Certificate and Nonce are optional. The signatures are null/empty. The details of this are described in Part 4.	yes (Core 2017 Server Facet)
Session Minimum 1	Support minimum 1 Session (total).	yes (Core 2017 Server Facet)
Session Minimum 2 Parallel	Support minimum 2 parallel Sessions (total for all Clients).	yes (Micro Embedded Device 2017 Server Profile)

Subscription Services

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
Subscription Basic	Support the following Subscription Services: CreateSubscription, ModifySubscription, DeleteSubscriptions, Publish, Republish and SetPublishingMode.	yes (Embedded DataChange Subscription Server Facet)
Subscription Minimum 1	Support at least 1 Subscription per Session. This number has to be supported for all of the minimum required sessions.	yes (Embedded DataChange Subscription Server Facet)
Subscription Publish Min 02	Support at least 2 Publish Service requests per Session. This number has to be supported for all of the minimum required sessions. Support of a NotificationMessage retransmission queue is not required; if not available the Republish Service returns Bad_MessageNotAvailable.	yes (Embedded DataChange Subscription Server Facet)
Subscription Publish Discard Policy	Respect the specified policy for discarding Publish Service requests. If the maximum number of Publish Service requests has been queued and a new Publish Service request arrives, the "oldest" Publish request has to be discarded by returning the proper error.	yes (Embedded DataChange Subscription Server Facet)

View Services

Title	Description	Mandatory in any Profile

Title	Description	Mandatory in any Profile
View Basic	Support the View Service Set (Browse, BrowseNext).	yes (Core 2017 Server Facet)
View TranslateBrowsePath	Support TranslateBrowsePathsToNodeIds Service.	yes (Core 2017 Server Facet)
View RegisterNodes	Support the RegisterNodes and UnregisterNodes Services as a way to optimize access to repeatedly used Nodes in the Server's OPC UA AddressSpace.	yes (Core 2017 Server Facet)
View Minimum Continuation Point 01	Support minimum 1 continuation point per Session. Server View Minimum	yes (Core 2017 Server Facet)