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When you have a question about how a technical system works, look first for the specification, RFC, official guide, or reference page maintained by the team responsible for it. Then search for the section that answers your question, read its definitions, and work through its examples. You usually do not need to read a long document from beginning to end.
Why start with the source maintained by the people responsible?
Secondary articles can be useful introductions, but several summaries may repeat the same misunderstanding or describe behavior that has since changed. A primary technical source is closer to the rule or implementation it describes. Asael Shinder captures the idea in his DEV Community essay: “The specification. The RFC. The official guide. The reference page maintained by the team that owns the code.”
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That does not mean every official document is automatically the right one. Check who maintains it, what it describes, and whether its version and date match the technology you are using. A specification may define normative behavior; an official guide may explain how a particular implementation behaves. Those are related, but not interchangeable, questions.
How to find the section that answers your question
- Identify the responsible source. Look for the relevant specification, RFC, official guide, or reference documentation maintained by the standards body, project, or team responsible for the technology.
- Search within the document. Use the page or document search for the behavior, command, header, or term in your question. Open the relevant section rather than assuming you must read everything.
- Read definitions first. A familiar word can have a precise technical meaning. Confirm how the document defines it before applying everyday assumptions.
- Check the examples. Examples show how a rule is applied and can expose details that a definition alone leaves abstract.
- Verify version and date. Make sure the documentation applies to your software release or to the current standard. If it cites an older specification, check whether a later document supersedes it.
Skip material that does not bear on your question. Focused reading is not a shortcut around precision: it is a way to spend attention on the definitions, rules, and examples that matter.
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What this looks like in practice
HTTP caching
For questions about HTTP caching rules, RFC 7234 is a primary specification titled “Hypertext Transfer Protocol (HTTP/1.1): Caching.” The RFC Editor identifies it as an Internet Standards Track document dated June 2014; it defines HTTP caches and associated header fields. That date matters: before relying on it for current technical guidance, check whether a later RFC has superseded it. Read RFC 7234 at the RFC Editor.
PostgreSQL transaction isolation
For a question about how PostgreSQL handles transaction isolation, use documentation for the PostgreSQL release in question. The PostgreSQL 16 transaction isolation documentation explains isolation levels, the phenomena used to distinguish them, PostgreSQL’s implementation, and the SET TRANSACTION command. Its examples help connect the terminology to behavior. Documentation for version 16 should not be assumed to describe every other release.
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When a secondary explanation still helps
An official source is most useful when you need the rule, exact definition, or behavior for a particular version. A secondary explanation can help when the primary document is difficult to approach, provides little context, or assumes knowledge you do not yet have. Use it as a guide to the primary material, then check important claims against the relevant official section.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchIf two sources seem to disagree, first check whether they cover different versions, implementations, or meanings of the same term. A disagreement may turn out to be a vocabulary or applicability issue rather than a conflict about the underlying behavior. The primary source can clarify what it actually specifies; it cannot, by itself, prove broader claims about how people learn or how an entire industry works.
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