# API Reference > Reference: API reference of Opc.UaFx.Advanced v2.59 for netstandard2.0.
Package
Opc.UaFx.Advanced v2.59.0
Target framework
netstandard2.0
## Client **Basics** | Topic | Description | |---|---| | [Getting started](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/getting-started) | Connect a client to a server and disconnect again, also for OPC Classic servers. | | [Configuration](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/configuration) | Application, connection monitoring, transfer limits, certificate and XML configuration of a client. | **Data** | Topic | Description | |---|---| | [Read and write values](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/read-write-values) | Read and write values of one or many nodes, other attributes and array ranges. | | [Process many values efficiently](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/bulk-access) | Read, write and subscribe thousands of values in one call, within the limits of the server. | | [Browse nodes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/browse) | Explore the address space of a server, node by node or several levels at once. | | [Subscriptions](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/subscriptions) | Subscribe to value changes and events, handle notifications and filter them. | | [Structured data](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/structured-data) | Access structured data types by name, dynamically or typed, and generate or define them. | | [Historical data](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/historical-data) | Read, modify and delete historical values and read the event history. | | [Node types](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/node-types) | Work with method, file, data type, variable and data item nodes. | | [Read and write files](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/file-access) | Read and append to file nodes of a server, open them as a stream and check rights. | **Events and alarms** | Topic | Description | |---|---| | [Events](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/events) | Receive, filter and evaluate events of a server, including audit events. | | [Alarms and conditions](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/alarms-conditions) | Conditions on event nodes: dialog, acknowledgeable and alarm conditions up to limit alarms. | **Advanced** | Topic | Description | |---|---| | [Edit the address space](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/address-space) | Add and delete nodes and references in the address space of a server. | | [OPC Classic](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/opc-classic) | Access OPC DA, AE and HDA servers with the same client, locally or via DCOM. | **Operation** | Topic | Description | |---|---| | [Long-running clients](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/long-running-clients) | Detect connection losses, restore sessions and recreate subscriptions in clients running around the clock. | | [Handle errors](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/error-handling) | Results with status codes, OpcException and the status codes that occur most often. | | [Test clients](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/client/testing) | Test client logic without a plant against an in-process server with test nodes. | ## Server **Basics** | Topic | Description | |---|---| | [Configuration](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/configuration) | Application, certificate, endpoints, network binding, transfer limits and XML configuration of a server. | **Provide data** | Topic | Description | |---|---| | [Provide data from a device](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/device-gateway) | Provide the values of a controller or field device, with data quality and writes to the device. | | [Manage nodes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/node-management) | Create nodes in the address space, control their visibility and update them at runtime. | | [Read and write values](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/read-write-values) | Provide values of nodes and handle read and write requests of clients. | | [Historical data](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/historical-data) | Store historical values and provide them to clients, with a custom history provider or the built-in historian. | **Information models** | Topic | Description | |---|---| | [Node types](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/node-types) | Create and implement method, file, data type, variable and data item nodes. | | [Data types at runtime](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/dynamic-data-types) | Define structures and enumerations at runtime and provide their values without .NET types of your own. | | [State machines](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/state-machines) | Define finite state machines and change their states at runtime. | | [NodeSets](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/nodesets) | Import information models as NodeSet and implement their nodes. | | [Node models](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/node-models) | Define which child nodes a typed node gets and take start values from the type definition. | **Events and alarms** | Topic | Description | |---|---| | [Events](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/events) | Publish global events and provide local events through event nodes. | | [Alarms and conditions](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/alarms-conditions) | Provide conditions on event nodes: dialog, acknowledgeable and alarm conditions up to limit alarms. | **Operation** | Topic | Description | |---|---| | [Monitor requests](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/request-monitoring) | Monitor request and response messages of the server and query its metrics. | | [Deploy the application](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/server/deployment) | Ship a server application: certificate, configuration files, discovery server and licensing. | ## Security | Topic | Description | |---|---| | [Users and roles](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/security/users-roles) | User identities, user sign-in, access control lists and roles. | | [Secure clients](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/security/client) | Choose endpoints, validate server certificates, protect the client certificate and sign in users. | | [Secure servers](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/security/server) | Endpoints, client certificates, users, roles, access control lists, GDS push and audit events. | ## Licensing | Topic | Description | |---|---| | [Set up the license](https://www.traeger.de/en/docs/development/opcua/api/v2.59/groups/license-setup) | Evaluation, license key, querying the license in use and checking it on startup. | - [Namespaces](https://www.traeger.de/en/docs/development/opcua/api/v2.59/namespaces/): All types of Opc.UaFx.Advanced, by namespace. - [API Changes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/changes/): Added, removed, changed and obsoleted APIs per version.