Glossary
This glossary defines Kioku’s domain vocabulary. These are the canonical terms: the documentation and the UI should use them with the spelling and capitalization shown here. When you need a word for one of these ideas, use the word here rather than inventing a synonym.
Content model
Section titled “Content model”Element
Section titled “Element”The shared name for your learning content. Topics, Extracts, and Items are all Elements — the same kind of object playing different roles.
Reading material — an imported article, web page, or PDF that you read incrementally. Topics are scheduled for re-reading on their own rhythm, separate from your flashcards.
Extract
Section titled “Extract”A passage you pull out of a Topic because it’s worth remembering. Extracts sit between reading and recall: they preserve context and can be promoted into one or more Items.
A flashcard — the smallest unit of recall. Items are scheduled by FSRS. An Item has a Card that defines what is shown and what is hidden.
The presentation layer of an Item: how it renders, and the fields that make up its front and back. Cards can be simple question-and-answer, fill-in-the-blank (cloze), or image occlusion.
Source
Section titled “Source”An imported document a Topic comes from: its URL, title, and content. One Source can yield many Topics.
Collection
Section titled “Collection”A self-contained body of work — your Elements, Cards, review history, and settings. Collections isolate data and can be exported, imported, and switched between.
Reading & extraction
Section titled “Reading & extraction”Incremental reading
Section titled “Incremental reading”Reading a Source a little at a time across many sessions instead of all at once, interleaving it with reviews and with other Sources. See Incremental reading.
Highlight
Section titled “Highlight”A span of text you mark inside a Topic. Highlights are the raw material for Extracts.
A fill-in-the-blank deletion written as {{c1::hidden}} or
{{c1::hidden::hint}}. Each distinct cloze number creates a separate Card. See
Cloze syntax.
Image occlusion
Section titled “Image occlusion”A Card type that hides regions of an image and asks you to recall what’s beneath them.
Static import / Live import
Section titled “Static import / Live import”Static imports save a clean copy of the page at import time. Live imports keep only the URL and load the page during review, so the content stays current.
Thread mode
Section titled “Thread mode”A live-import setting that lets you navigate within the same domain during review without triggering a “navigated away” warning.
Scheduling & review
Section titled “Scheduling & review”Spaced repetition
Section titled “Spaced repetition”Scheduling reviews at increasing intervals timed to just before you would forget, maximizing retention per minute studied.
Free Spaced Repetition Scheduler (version 6 in Kioku), the algorithm that schedules Items. It models each Item’s memory with stability and difficulty and predicts retrievability over time. See Spaced repetition.
Stability / Difficulty / Retrievability
Section titled “Stability / Difficulty / Retrievability”The three quantities FSRS tracks per Item. Stability is how long memory lasts; difficulty is how hard the Item is to retain; retrievability is the probability you’d recall it right now.
Retention
Section titled “Retention”The probability of recall you target at review time. Higher retention means more frequent reviews; lower retention means fewer reviews but more lapses. Tunable in settings.
Review
Section titled “Review”A single scheduled encounter with an Item, ending in a rating.
Rating
Section titled “Rating”Your grade on a reviewed Item: 1 = Again, 2 = Hard, 3 = Good, 4 = Easy. The rating feeds FSRS to compute the next interval.
Topic action
Section titled “Topic action”The equivalent of a rating for a Topic: read, extract, skip, or done. Topic actions decide when a Topic comes back.
The ordered set of Topics and Items due in a session. The review queue interleaves reading and recall.
Reschedule
Section titled “Reschedule”Recomputing future due dates — for one Element or in bulk — after a settings change such as a new retention target.
Advanced
Section titled “Advanced”Concept
Section titled “Concept”A way to group related Elements together in Browse, distinct from tags.
Reference (ref)
Section titled “Reference (ref)”A link between Elements — for example, an Extract back to the Topic it came from.
The SuperMemo Plan: a tool for laying out a study day as scheduled activities, running it, and reviewing how actual time compared to the plan.
Collection switching
Section titled “Collection switching”Changing the active Collection, so you can work in one self-contained body of material at a time.
See also
Section titled “See also”- Core concepts — narrative explanations of the model.