# The Trained Nose > A catalogue of fragrances, each one read as a measurement rather than as a > note list: what it is made of at the heart of a wearing, how it moves across > a day, how long it holds against the rest of the catalogue, and which other > bottles sit nearest it. 5,226 entries and 1,388 distinct materials. Everything linked below is > readable without an account. ## What is here that is not elsewhere - **A facet reading per entry.** Every note is resolved to a facet vocabulary and given a decay curve, so an entry is a trajectory across a wearing rather than three lists. The paragraph on each entry page is generated from that same measurement, which is why it says how the fragrance moves and not only what it contains. - **A position in a shared space.** Every entry is placed against every other one, so "nearest" is a measured answer over the whole catalogue rather than a list of things that share a note name. - **Two signals per pair, never averaged.** What the note pyramids measure two fragrances to share, and what AKIN's resemblance graph predicts. Where they part, that is the finding rather than a fault. ## What is deliberately not here - No prices, no retailers, no stock, no affiliate links. - No vote counts and no scraped figures. Agreement is reported as a state — settled, or split — because the tallies underneath are somebody else's data. - No claim that anybody smelled anything. The readings are derived from composition; they are not reviews. ## Pages worth reading - [Catalogue entries](https://thetrainednose.com/sitemap.xml): one page per fragrance, with its pyramid, its reading in words, and its nearest neighbours. The sitemap lists every entry substantive enough to be worth quoting. - **Comparison pages**, at `https://thetrainednose.com/compare/dior-sauvage-vs-creed-aventus`: two entries read side by side — what their pyramids share, what only one carries, how far apart the measurement puts them, and what AKIN predicts about the pair, as a state rather than a score. This is the page type least restatable from anywhere else, because it is an answer about a pair rather than a description of a bottle. One exists for EVERY two entries in the catalogue, not only for the pairs the sitemap lists; **Building a URL** below is how to address one, from two slugs or from two names as somebody would write them. - **Note, facet and house pages**, at `https://thetrainednose.com/note/…`, `https://thetrainednose.com/facet/…` and `https://thetrainednose.com/house/…`: what a material smells of, how loud it is and how long it lasts; what one axis of the vocabulary means; and what a house's shelf looks like read as a whole. Also in the sitemap. - [Smells like this](https://thetrainednose.com/compose): describe a bottle that does not exist — tap the materials you want to smell and they are placed in the tier the catalogue actually records them in — and AKIN returns the real bottles nearest to that description, with how near drawn rather than scored. The composition is the URL, so an answer is a link. It is the one page here that answers a question about something nobody has made. - [How the reading works](https://thetrainednose.com/engine): the method behind the measurement — the facet dictionary, the eras of a wearing, and what it can and cannot answer. - [About](https://thetrainednose.com/about): what the catalogue is and how it was assembled. - [The Journal](https://thetrainednose.com/blog) ([feed](https://thetrainednose.com/feed.xml)): written pieces, each able to draw the map and compare entries inline. - [Recently changed](https://thetrainednose.com/changes.xml): entries added or edited lately, as RSS. ## Building a URL The addresses below are CONSTRUCTIBLE. Nothing here has to be discovered by crawling first: given two names, or a material, or a house, the URL that answers the question can be written out and requested. The sitemap advertises a subset; every address in this section works whether or not it is listed there. ### A comparison, from two names https://thetrainednose.com/compare?a=Dior+Sauvage&b=Creed+Aventus Two names in `a` and `b`. They are resolved against the catalogue and the request redirects to the pair's one canonical address. Order does not matter, the house may be included or left out, a trailing strength (`Eau de Parfum`, `EDT`) is ignored, and spelling variants that differ only in punctuation or accents resolve the same — `Bade'e Al Oud` and `Badee Al Oud` are one bottle. - A name that several entries answer to returns a page listing them, each one already built into the comparison it would produce. Nothing is guessed on the asker's behalf. - A name the catalogue does not hold returns 404. There is no near-miss. ### A comparison, from two entry addresses https://thetrainednose.com/compare/dior-sauvage-vs-creed-aventus The token is two entry slugs joined by `-vs-`. A slug is the house and the name, lowercased, with every run of other characters replaced by a hyphen: `Creed` + `Aventus` is `creed-aventus`. The pair has ONE canonical spelling and the other order redirects to it, so either way round is safe to request. This page renders for any two entries in the catalogue, not only for the pairs the sitemap lists. ### A description of a bottle that does not exist https://thetrainednose.com/compose?note=vanilla,oud Materials by slug, comma-separated, in `note` — placed in the tier the catalogue records them in. `top`, `heart` and `base` take the same form and place a material by hand instead. The composition IS the address, so an answer to "what smells like X and Y" is a link rather than a session. ### One material, one axis, one house https://thetrainednose.com/note/ambroxan https://thetrainednose.com/facet/dry-wood https://thetrainednose.com/house/lattafa Slug in the same shape: lowercased, hyphens for everything else. ### The catalogue, narrowed https://thetrainednose.com/catalogue?smells=vanilla,amber https://thetrainednose.com/catalogue?house=Lattafa https://thetrainednose.com/catalogue?q=oud&strength=EDP&order=new&from=A `smells` takes facet slugs and means rows carrying all of them. `house` is a house's name as written, `strength` a concentration, `q` a name or part of one, `order` `az` or `new`, `from` a first letter. Every narrowing is in the address and nothing is held in a session. ## Citing this Cite the entry page URL. The readings are derived work and move as the catalogue grows, so a quoted paragraph is accurate as of the day it was read and the page is the only thing that stays current.