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 match rate
Citation match rate is the percentage of AI-engine references to a source that include a clickable link back to that source. Computed as (linked citations) ÷ (all attributed references) × 100, it isolates the link-bearing subset of attribution from unlinked mentions in the same response stream.
GPT·Plx0×Cld·Cop0×Gem·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·
G
intermediate
Generative search index
Generative search index is a glossary-coined practitioner shorthand for the retrieval-corpus backend that AI search engines query when fetching passages for generation. Standard industry terms for the underlying systems include vector database, RAG backend, hybrid search system, and (at the component layer) search index.
GPT0×Plx0×Cld0×Cop0×Gem·Cluster pillar
GEO content methods
GEO content methods are the content rewrites tested in Aggarwal 2023; most are weak or null levers, not the 30-40% the headlines claim.
GPT0×Plx0×Cld0×Cop0×Gem·