Interactions arise naturally from the affordances of resources or are purposefully designed into organizing systems.

(See §10.1, “Introduction”)

Accessing and merging resources are fundamental interactions that occur in almost every organizing system.

(See §10.1, “Introduction”)

User requirements, which layer of resource properties is used, and the legal, social and organizational environment can distinguish interactions.

(See §10.2, “Determining Interactions”)

Limited memory and attention capacities prevent people from remembering everything and make them unable to consider more than a few things or choices at once.

(See §10.2.1, “User Requirements”)

In order to enable interactions, it is necessary to identify, describe, and sometimes transform the resources in an organizing system.

(See §10.3.1, “Identifying and Describing Resources for Interactions”)

Merging transformations can be distinguished by type (mapping or crosswalk), time (design time or run time) and mode (manual or automatic).

(See §10.3.2.3, “Granularity and Abstraction”)

Implementations can be distinguished by the source of the algorithm (information retrieval, machine learning, natural language processing), by their complexity (number of actions needed), by whether resources are changed, or by the resource description layers they are based on.

(See §10.4, “Implementing Interactions”)

Important aspects for the evaluation of interactions are efficiency (timeliness and cost-effectiveness), effectiveness (accuracy and relevance) and satisfaction (positive attitude of the user).

(See §10.5, “Evaluating Interactions”)

The concept of relevance and its relationship to effectiveness is pivotal in information retrieval and machine learning interactions.

(See §10.5.2.1, “Relevance”)

The trade-off between recall and precision decides whether a search finds all relevant documents (high recall) or only relevant documents (high precision).

(See §10.5.2.2, “The Recall / Precision Tradeoff”)

The extent of the organization principles also impacts recall and precision: more fine-grained organization allows for more precise interactions.

(See §10.5.2.2, “The Recall / Precision Tradeoff”)