# Expression An expression is a sequence of symbols following the [Economic Space Protocol](/economic-space-protocol.md) that is meaningful only within the scope of an [Economic space](/economic-space.md). Economic space expressions may refer to the resources contained in the scope from which it is evaluated and clearly and unambiguously describe the actions that you or other economic space agents may perform. These actions may include the creation of a new resource, an interaction with another [Economic space agent](/economic-space-agent.md), alteration to the economic space record, or the invocation of another [Protocol](/protocol.md). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://glossary.ecsa.io/expression.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.