Metrics Platform/Glossary

This page documents terms used in the Metrics Platform documentation.
== Terms ==
=== Analytics sampling ===
Analytics sampling is the logic that determines whether an event is included in data collection for an event stream, including the sampling unit and rate. See Analytics sampling.
=== API ===
The methods provided by the Metrics Platform clients to submit events. See Metrics Platform/API.
=== Base schema ===
A reusable default schema provided by Metrics Platform to use with web or mobile app instruments
=== Baseline ===
See mw:Product Analytics/Glossary#Baseline.
=== Bucketing ===
See #Experiment enrolment sampling.
=== Contextual attributes ===
Fields in an event data object that provide information about the performer who triggered the event and the wiki where the event occurred. For example, the page title and page language. The values of contextual attributes that are included in the stream configuration are populated automatically by Metrics Platform when the event is generated. See Metrics Platform/Contextual attributes.
=== Data contract ===
Refers to the Metrics Platform base schemas and the conventions for creating custom schemas. See Metrics Platform/Schemas.
=== Experiment ===
See mw:Product Analytics/Glossary#Experiment.
=== Experiment enrolment sampling ===
Experiment enrolment sampling is the act of enrolling users into experiments (also called an A/B tests) and consistently assigning an enrolled user a variant of the feature that is being experimented on. Experiment enrolment sampling is also known as bucketing. See Experiment enrolment sampling.
=== Experiment orchestration ===
See mw:Product Analytics/Glossary#Experiment orchestration.
=== Experimentation lab ===
Metrics Platform tool that allows you to create and manage experiments and baseline instruments, available at mpic.wikimedia.org. Also know an MPIC.
=== Event ===
A data object that represents a user interaction happening at a definite time. For example, a user clicking a button. Instruments work by sending event data objects to an event stream in response to user actions or app conditions.
=== Event stream ===
A continuous series of structured event dataEvent Platform/EventStreams HTTP Service. An instrument publishes events to an event stream. Contextual attributes and analytics sampling are configured per event stream. To configure an event stream manually using MediaWiki's configuration files, see Metrics Platform/Stream configuration. 
=== Fragment ===
A partial schema designed to be combined with other fragments to build custom schemas. See Metrics Platform/Custom schemas.
=== Guardrail metric ===
See mw:Product Analytics/Glossary#Guardrail metric.
=== Hive ===
Datasource where event stream data is available for analysis. See Data Platform/Systems/Hive.
=== Hypothesis ===
See mw:Product Analytics/Glossary#Hypothesis.
=== Instrument ===
See mw:Product Analytics/Glossary#Instrument.
=== Instrumentation ===
See mw:Product Analytics/Glossary#Instrumentation.
=== Interaction data ===
Properties supported by the Metrics Platform schemas that can be customized to include data specific to an instrument. For example, action_context and element_id. See Metrics Platform/Schemas.
=== L3SC review ===
A process in which new data collection activities are reviewed by Privacy Engineering and Privacy Legal depending on risk tier. See foundation:Legal:Data Collection Guidelines.
=== Leading indicator ===
See mw:Product Analytics/Glossary#Leading indicator.
=== Monotable ===
Instruments using the same base schema can use the same event stream. The resulting data is available in a shared Hive table. This shared table and this architectural approach is sometimes referred to as the monotable. See Metrics Platform/Decision Records/Single Table Per Base Schema.
=== MPIC ===
See #Experimentation lab.
=== Primary metric ===
See mw:Product Analytics/Glossary#Primary metric.
=== Product health metric ===
See mw:Product Analytics/Glossary#Product health metric.
=== Rolling metric ===
See mw:Product Analytics/Glossary#Rolling metric.
=== Sampling ===
Can refer to analytics sampling or experiment enrolment sampling. See Metrics Platform/Sampling.
=== Secondary metric ===
See mw:Product Analytics/Glossary#Secondary metric.
=== Schema ===
A data structure used by Metrics Platform to validate event data. Metrics Platform schemas as structured as JSON Schemas and written as YAML files. See Metrics Platform/Schemas.
=== Stream ===
See #Event stream.
=== Trailing (lagging) indicator ===
See mw:Product Analytics/Glossary#Trailing (lagging) indicator.
== References ==