Add terms and definitions

content/terms_and_definitions/terms_and_definitions.adoc

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 include::{root-path}_config.adoc[]
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-TODO: Add terms and definitions
+3D Asset::
+A 3D model. containing the 3D geometry, combined with assigned material properties and specific meta data.
 
-Static road network::
-Collection of connected roads enriched by static objects that do not change during runtime of a simulation.
+3D Model::
+A (mathematical) geometrical, coordinate-based representation of the surface of an object.
+This excludes physical material properties. For a combination of 3D geometry and physical material properties, see 3D Asset.
+
+3D Environment::
+A 3D representation of the surrounding of a simulated sensor.
+The 3D environment can consist of multiple 3D assets.
+
+Co-Simulation::
+Simulating multiple independent models connected with interfaces.
+A co-simulation platform handles the timing and data transfer between the individual models
+
+Ground truth::
+True static and dynamic states of all objects as defined by content creator or observed by omniscient observer (e.g. simulation platform).
+
+Material::
+A collection of material properties belonging to one entity.
+
+Material assignment::
+A mapping of material IDs to parts of 3D models.
+The material IDs are unique a point to a set of material properties in separate material files.
+
+Material classification::
+Standardized classification scheme that sorts materials into classes and groups of classes, for example, based on their physical properties.
+
+Material Parameter File::
+A file in json format containing defined material properties according to the OpenMATERIAL standard.
+
+Material property::
+Intensive physical or chemical properties of a material 
+
+* Notes: Open Point: What about geometric properties, i.e. roughness, thickness?
+
+Multispectral/hyperspectral::
+A wide range of wavelengths.
+
+Normals (face, vertex normals)::
+A vector that is perpendicular to a given object, surface, vertex or geometrical primitive.
+
+Object::
+An entity to which an object ID can be assigned.
+It comprises discrete meshes and defined 3D boundaries.
+
+Object Part / Subtype::
+(To be defined)
+
+* Notes: What is an object and what is an object part?
+
+Object Type::
+Class of objects with common properties
+
+Perception::
+The process of detecting objects and generating situational awareness of the surrounding of an automated system using perception sensors.
+"Machine perception is to reliably detect all the other road users relevant to the operation of the automated driving, and to assign them correctly to the traffic infrastructure."
+
+* Source: Klaus Dietmayer, Predicting of Machine Perception for Automated Driving, 2016
+
+Physical (as in physical parameter)::
+A physical property is any property of a physical system that is measurable. 
+
+* Source: Mark, Burgin (2016-10-27). Theory Of Knowledge: Structures And Processes
+
+Post (Rendering) Effects::
+Rendering techniques to improve fidelity while maintaining performance, that are typically non-physical (or in other words fake)
+
+Scenario::
+A description of the behavior or temporal evolution of physical objects and environmental conditions on the driving infrastructure over an interval of time, including the movement of traffic participants or the change of environmental conditions.
+
+* Source: ASAM OpenSCENARIO v1.3.0 standard, 2024
+
+Signal (Energy) Propagation::
+"During signal [or energy] propagation, the signal travels through the environment and possibly interacts with objects and particles."
+
+* Source: Linnhoff et al., Towards Serious Perception Sensor Simulation for Safety Validation of Automated Driving - A Collaborative Method to Specify Sensor Models, 2021
+
+Simulation Platform::
+Application orchestrating and running the simulation. The can be an all-in-one solution including the generation of the 3D environment or a co-simulation platform orchestrating a co-simulation of multiple sensor, models, vehicle dynamics models etc.
+
+Validation::
+Comparing simulated data to measured data and quantifying the differences.