# Basic concepts ### Fix A potential solution to the described [problem](#problem). ### Link A link that refers to the potential solution of the problem. ### Message The error message that is built from the required problem, fix and optional range, type on the template. ### Problem The problem that causes an error to be thrown. ### Range The minimum and maximum range that causes the [`RangeError`](https://error.angular-package.dev/rangeerror) to be or not to be thrown. ### Template A template for the message error with replaceable variable tags. ### Type The type that causes the [`TypeError`](https://error.angular-package.dev/typeerror) to be or not to be thrown. ### Unique identification The unique identification of the error help finds a solution. It's based on a generic type variable to get the exact type. --- # 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://error.angular-package.dev/getting-started/basic-concepts.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.