All terms
The 2026 vocabulary of Generative Engine Optimization, with live per-term citation status across ChatGPT, Perplexity, Claude, and Copilot.
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A
C
intermediate
Citation probe protocol
A citation probe protocol is the standardized operating procedure for measuring whether AI engines cite a publisher's content. It locks down query design, cadence, engine coverage, recording schema, disambiguation rules, and signal-vs-noise thresholds, turning ad-hoc 'ask ChatGPT and see' into a repeatable, comparable, vendor-neutral measurement program. Practitioner-coined methodology entry; the cluster's foundational SOP for the six citation-metrics anchors.
GPTPlx·CldCopGem·intermediate
Cite Sources Optimization
Cite Sources Optimization is one of the four top-performing source-content modification methods in Aggarwal et al. 2023's GEO paper. The method actively rewrites content to add inline source citations for claims made, scoring PAWC 24.9 vs baseline 19.5 (~28% relative gain). The practitioner discipline framing extends the paper's one-shot intervention into a habitual writing technique.
GPTPlx·CldCopGemintermediate
Cite-ability
Cite-ability is a practitioner-coined content property describing how suitable a passage is for AI extraction, quotation, and attribution. It is informed by factors like structural clarity, self-contained phrasing, and attribution clarity, but it is not a formal industry metric and is not defined in any major academic paper.
GPT·Plx·Cld·Cop0×Gem0×
D
intermediate
DefinedTerm schema
DefinedTerm is a schema.org type representing a term defined elsewhere (typically in a glossary), helping systems that parse structured data understand a term, its definition, and its relationship to a glossary source.
GPT0×Plx·Cld0×Cop0×Gem0×intermediate
DuckDuckGo AI citation
DuckDuckGo AI citation is the discrete event of a webpage being included as a linked source in DuckDuckGo's AI surfaces. Two surfaces matter: Search Assist (the AI-generated inline answer above DuckDuckGo search results, formerly DuckAssist, which always links to one or two sources beneath the summary) and Duck.ai (the privacy-anonymized chat interface to third-party models, where citation behavior depends on the underlying model). DuckDuckGo runs its own crawler, DuckAssistBot, for Search Assist.
GPT·Plx·Cld0×Cop0×Gem0×
F
P
S
intermediate
Sub-document retrieval
Sub-document retrieval is the practice of indexing and retrieving passages or paragraphs rather than whole documents. It is a common retrieval pattern in RAG and AI-search systems, especially when long documents need to be matched against specific user queries.
GPTPlx·CldCopGemintermediate
Sycophancy vs cite-able fact
Sycophancy is the LLM failure mode of producing agreeable, hedge-laden, or context-flattering responses at the expense of factual specificity. Cite-able fact production is a separate content-writing pattern that emphasizes specific, attributed, falsifiable claims. The two are not strict opposites, but understanding both is useful for AI-search content writers.
GPT0×Plx·Cld0×Cop0×Gem0×