Product/filter
filter
also called filter element
A consumable element that a fluid is passed through to take particles out of it — an oil filter, an air filter, a cabin filter, a fuel filter, a vacuum's dust filter, a coffee cone, a water cartridge. It hangs directly off Product. It is NOT a Container and NOT a Strainer: a strainer is a straining VESSEL under Container with a holding volume (an inherited `capacity`) and a coarse qualitative `mesh_grade`, which sits still and holds what it catches, while a filter has no holding volume at all, is plumbed into a flowing circuit or an air tract, and is thrown away or washed when it is full. A fine-mesh kitchen sieve is a Strainer; a ceramic water candle is a Filter, and the vessel that holds the water around it is a UtilityVessel. It earns its place over Product by six slots no other product carries: `filtration_duty` (what it cleans and in what service — the fact that makes it the thing it is), `filter_form` (spin-on canister, bare cartridge, panel, round element, cone, in-line body, in-tank sock), `filter_media` (what the element is made of, stated many times because real elements layer paper behind carbon behind a biofunctional layer), `filtration_rating` (the micron figure, with its efficiency, basis and test standard hanging off it), `thread_size` (the spin-on interface) and `water_separation`. Its body material, its outside dimensions, its brand, the maker's part number and the numbers it also answers to are all already on the universal card — `material`, `length`/`width`/`height`/`diameter`, `brand`, `manufacturer`, `trade_identifier` with `identifier_scheme`, `also_known_as`. WHICH ENGINE OR CAR IT FITS IS NOT A POOL FACT and is not stated here (REFINE-LOG 2026-08-25): a fitment is a cross-reference to a product the pool does not hold, and it lives downstream as instance prose in the shop's own words. A filter is not an automotive good — UNSPSC files the whole family in segment 40 (filtration), and the coffee cone and the water candle in this class are the proof.
A genuine kind — it answers questions its parent does not.
A filter is a product that adds its own filtration rating, filter form, filter media, filtration duty, thread size and water separation.
what it can tell you the questions a filter answers
Grouped by the part of the product each question is about. Every filter can answer all of these.
Each filter has an also known as, a display name, a model name, a trade identifier, a single active state, a single brand, a single filter form, a single filtration duty, a single identifier exists, a single manufacturer, a single seller type, a single sub-brand and any number of tracking markings. Each trade identifier carries its own identifier scheme.
Beyond what a product measures, it adds its own filtration rating (in millimeters or inches). It also records depth, diameter, height, length and width (in millimeters or inches), net content (in liters) and net weight (in grams or kilograms). It has a single thread size and water separation. Each filtration rating carries its own filtration efficiency, filtration basis and filtration standard.
It has a single size system. It comes in any number of colors and materials. It offers any number of filter medias, patterns and sizes.
It can be listed at any number of list prices, list prices, list prices, list prices, list prices and list prices. It has a single custom amount enabled. It offers any number of offered bies. Each list price carries its own price valid from, price valid until and price basis. Each offered by carries its own stance and party name. Each price component carries its own price component type and applies to payment method. Each sale price carries its own compare-at price, reference price type, promotion type, price valid from, price valid until, price eligibility and price basis. Each tier price carries its own tiers mode, tier minimum quantity, tier flat fee, price eligibility, price valid from, price valid until and price basis.
Each filter states its age restriction, country of origin, regulatory permit, responsible person, un number and warning. It may carry any number of certifications, geographical indications and hazard classes. Each geographical indication carries its own designated region. Each hazard class carries its own ghs pictogram and ghs signal word. Each regulatory permit carries its own permit regime. Each warning carries its own warning category.
It records description and media. Each media carries its own medium type, media role, media alt text, media facing and document type.
It has a single availability status, any number of eligible regions, any number of ineligible regions and inventory quantity. Each inventory quantity carries its own quantity state, place name and place type.
A filter can carry a single fit verdict and aggregate rating, and any number of comments, community answers, community questions, reviews, review highlight tags and engagement counters. Each aggregate rating carries its own rating count. Each comment carries its own commenter name, commenter role and comment date. Each community answer carries its own answerer role, answer accepted and answer vote count. Each community question carries its own question author, question date and question vote count. Each engagement counter carries its own engagement signal, engagement window and engagement rank category. Each review carries its own review rating, review headline, review author, review date, verified purchase, review kind, review aspect, incentive disclosure, review language, review source platform, reviewer media, helpful vote count and variant reviewed.
Each filter is sold in a stated item condition. A free-text condition note can add the specifics.
It measures shipping weight (in grams or kilograms). It has a single requires shipping. It offers any number of fulfilment channels and shipping restrictions. It records hs tariff code. Each shipping rate carries its own delivery speed, shipping region, minimum handling time, maximum handling time, minimum transit time, maximum transit time and free-shipping threshold.
Each instalment plan carries its own instalment count, down-payment amount and credit type. Each recurring price carries its own billing interval, interval count, usage type, meter event name, usage aggregation, trial length, trial end behaviour, setup fee, phase iterations and price basis.
It has a single tax behaviour. It records tax category.
It has a single gift card. It supports any number of digital delivery methods. Each digital delivery method carries its own licence term, licence scope, delivery platform / drm, download limit and access expiry.
It has a single return policy. It records warranty. Each return policy carries its own return window, return method and return fee responsibility. Each warranty carries its own warranty scope and warranty term.
It supports any number of accepted payment methods.
It measures maximum order quantity and minimum order quantity (as a whole count of selling units). It offers any number of customer eligibilities and purchase gates.
It records personalization field. Each personalization field carries its own input type, field required and maximum length.
slot-profile what a filter answers
Every question it can answer — added here, shadowed (tightened from a parent), or inherited from above. Each answer is a ◇token, a №number + unit, or “free text.
| question | answered with | how many | from |
|---|---|---|---|
| active state | ◇token Active States | one | product |
| also known as | “free text plain text formats | many | product |
| brand | ◇token Brands | many | product |
| display name | “free text plain text formats | required · one | product |
| filter form new to this kind | ◇token Filter forms | one | added |
| filtration duty new to this kind | ◇token Filtration duties | required · one | added |
| identifier exists | ◇token Identifier Expectation | one | product |
| manufacturer | ◇token Manufacturers | one | product |
| model name | “free text plain text formats | one | product |
| seller type | ◇token Seller Types | one | product |
| sub-brand | ◇token Sub-Brands | one | product |
| tracking marking | ◇token Tracking Markings | many | product |
| trade identifier | “free text code formats | many | product |
| each trade identifier carries identifier scheme | |||
| question | answered with | how many | from |
|---|---|---|---|
| depth | №number + unit Length units | one | product |
| diameter | №number + unit Length units | one | product |
| filtration rating new to this kind | №number + unit Length units | one | added |
| each filtration rating carries filtration efficiencyfiltration basisfiltration standard | |||
| height | №number + unit Length units | one | product |
| length | №number + unit Length units | one | product |
| net content | №number + unit Volume units | one | product |
| net weight | №number + unit Mass units | one | product |
| thread size new to this kind | ◇token Thread sizes | one | added |
| water separation new to this kind | ◇token Water separation types | one | added |
| width | №number + unit Length units | one | product |
| question | answered with | how many | from |
|---|---|---|---|
| color | ◇token Color types | many | product |
| filter media new to this kind | ◇token Filter media types | many | added |
| material | ◇token Material types | many | product |
| pattern | ◇token Patterns | many | product |
| size | ◇token Sizes | many | product |
| size system | ◇token Size Systems | one | product |
| question | answered with | how many | from |
|---|---|---|---|
| custom amount enabled | ◇token Custom Amount Modes | one | product |
| custom amount maximum | №number + unit Currencies | one | product |
| custom amount minimum | №number + unit Currencies | one | product |
| list price | №number + unit Currencies | many | product |
| each list price carries price valid fromprice valid untilprice basis | |||
| offered by | ◇token Party roles | many | product |
| each offered by carries stanceparty name | |||
| price component | №number + unit Currencies | many | product |
| each price component carries price component typeapplies to payment method | |||
| sale price | №number + unit Currencies | many | product |
| each sale price carries compare-at pricereference price typepromotion typeprice valid fromprice valid untilprice eligibilityprice basis | |||
| tier price | №number + unit Currencies | many | product |
| each tier price carries tiers modetier minimum quantitytier flat feeprice eligibilityprice valid fromprice valid untilprice basis | |||
| question | answered with | how many | from |
|---|---|---|---|
| age restriction | ◇token Age restrictions | one | product |
| certification | ◇token Certifications | many | product |
| country of origin | ◇token Countries | one | product |
| flash point | №number + unit Temperature units | one | product |
| geographical indication | ◇token Geographical-indication schemes | many | product |
| each geographical indication carries designated region | |||
| hazard class | ◇token Hazard classes | many | product |
| each hazard class carries GHS pictogramGHS signal word | |||
| regulatory permit | “free text code formats | many | product |
| each regulatory permit carries permit regime | |||
| responsible person | “free text plain text formats | many | product |
| UN number | “free text code formats | one | product |
| warning | “free text longform text formats | many | product |
| each warning carries warning category | |||
| question | answered with | how many | from |
|---|---|---|---|
| description | “free text longform text formats | one | product |
| media | “free text media reference formats | many | product |
| each media carries medium typemedia rolemedia alt textmedia facingdocument type | |||
| question | answered with | how many | from |
|---|---|---|---|
| availability ends | “free text date formats | one | product |
| availability starts | “free text date formats | one | product |
| availability status | ◇token Availability statuses | one | product |
| eligible region | ◇token Regions | many | product |
| ineligible region | ◇token Regions | many | product |
| inventory quantity | №number + unit Quantity Units | many | product |
| each inventory quantity carries quantity stateplace nameplace type | |||
| question | answered with | how many | from |
|---|---|---|---|
| condition note | “free text longform text formats | one | product |
| item condition | ◇token Item Conditions | one | product |
| question | answered with | how many | from |
|---|---|---|---|
| fulfilment channel | ◇token Fulfilment Channels | many | product |
| HS tariff code | “free text code formats | one | product |
| requires shipping | ◇token Shipping Requirement | one | product |
| shipping rate | №number + unit Currencies | many | product |
| each shipping rate carries delivery speedshipping regionminimum handling timemaximum handling timeminimum transit timemaximum transit timefree-shipping threshold | |||
| shipping restriction | ◇token Shipping Restrictions | many | product |
| shipping weight | №number + unit Mass units | one | product |
| question | answered with | how many | from |
|---|---|---|---|
| instalment plan | №number + unit Currencies | many | product |
| each instalment plan carries instalment countdown-payment amountcredit type | |||
| recurring price | №number + unit Currencies | many | product |
| each recurring price carries billing intervalinterval countusage typemeter event nameusage aggregationtrial lengthtrial end behavioursetup feephase iterationsprice basis | |||
| question | answered with | how many | from |
|---|---|---|---|
| tax behaviour | ◇token Tax Behaviours | one | product |
| tax category | “free text code formats | one | product |
| question | answered with | how many | from |
|---|---|---|---|
| digital delivery method | ◇token Digital Delivery Methods | many | product |
| each digital delivery method carries licence termlicence scopedelivery platform / DRMdownload limitaccess expiry | |||
| gift card | ◇token Gift-card Nature | one | product |
| question | answered with | how many | from |
|---|---|---|---|
| return policy | ◇token Return Policy Categories | one | product |
| each return policy carries return windowreturn methodreturn fee responsibility | |||
| warranty | “free text plain text formats | many | product |
| each warranty carries warranty scopewarranty term | |||
| question | answered with | how many | from |
|---|---|---|---|
| accepted payment method | ◇token Payment Methods | many | product |
| question | answered with | how many | from |
|---|---|---|---|
| customer eligibility | ◇token Price Eligibility Segments | many | product |
| maximum order quantity | №number + unit Quantity Units | one | product |
| minimum order quantity | №number + unit Quantity Units | one | product |
| purchase gate | ◇token Purchase Gates | many | product |
| question | answered with | how many | from |
|---|---|---|---|
| personalization field | “free text plain text formats | many | product |
| each personalization field carries input typefield requiredmaximum length | |||