> For the complete documentation index, see [llms.txt](https://styles.bjcp.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://styles.bjcp.org/bjcp-2021-beer/introduction-to-beer-styles/common-attributes-of-all-beer-styles.md). # Common Attributes of All Beer Styles The sensory attributes discussed in this section are assumed to be present in every beer style description unless otherwise noted. It is not necessary to repeat all these characteristics for every style description. *Do not assume that since a characteristic, such as diacetyl, isn’t mentioned in a style description, that in any way it is allowable.* ***Unless explicitly noted in an individual style description***, all beer styles are assumed to be cleanly fermented and free from technical faults, including acetaldehyde, astringency, chlorophenols, diacetyl, DMS, fusel alcohol, and phenols. All beer styles are assumed to be free of packaging and handling faults, including oxidation, light-struck, sour, and musty characteristics. In mouthfeel, all beers are assumed to be free from astringency, and not be creamy or have any other palate sensations unless otherwise noted. Beers with an alcohol level of 6% or less are assumed to not have the flavor or warming nature of alcohol, unless otherwise noted. Higher-alcohol beers that have a noticeable alcohol presence should not be harsh, hot, solventy, or burning. The alcohol character if noted, should be clean and not have fusel alcohols. Lagers tend to be smooth, clean, and free of esters. Stronger and darker lagers may have light esters that round out the flavor. Pale lagers, especially very fresh ones, may have light but pleasant yeast-derived sulfur notes. Some sulfur notes may be fleeting. These sulfur notes are acceptable, but foul sulfur-based aromas (rotten eggs, sewer gas, etc.) are a fault. Styles made with a large amount of Pilsner malt may have low DMS notes; this is not a fault, but it is also not required unless otherwise noted. In both cases, the small amounts of sulfur or DMS should not be taken as meaning that prominent quantities are somehow desirable – they’re not. Just be aware that the use of some traditional ingredients often leaves small sensory indications of their presence that might be considered faults in other contexts; that is perfectly acceptable, although not required. Unless otherwise noted, assume all lagers to not have any fruitiness (esters). Ales tend to be less smooth than lagers, so unless otherwise noted, assume all ales may have some esters (not required, but not a fault). --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://styles.bjcp.org/bjcp-2021-beer/introduction-to-beer-styles/common-attributes-of-all-beer-styles.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.