# Term catalog

> The term catalog on one page: each term's signature, parameters, what it does to a YELT, and what state it holds, with a link to its full treatment.

Source: https://reinsurance.dev/financial-modelling/terms/

The term catalog has one row per financial term, generated from the term pages themselves, so this table and the five-blocks table on [Contracts as compositions](https://reinsurance.dev/financial-modelling/composition/#the-five-building-blocks) cannot differ. Each row gives the [financial term](https://reinsurance.dev/glossary/#term-financial-term)'s signature and parameters, what it does to a [year event loss table (YELT)](https://reinsurance.dev/glossary/#yelt-year-event-loss-table), what it consumes and produces, and what state it holds while doing it. The five terms are the ones the [dissection](https://reinsurance.dev/financial-modelling/dissection/) identifies in Contract 1. The link opens the full treatment: the formula, its effect on Trial 9 in isolation, a runnable implementation, and the [exceedance probability (EP) curves](https://reinsurance.dev/glossary/#ep-curve-exceedance-probability-curve) it produces across the [20-trial demo tier](https://reinsurance.dev/toolkit/trials/#demo-scale).

*[Table: Catalog table. See the web page: https://reinsurance.dev/financial-modelling/terms/]*

Every term is [YELT in, YELT out](https://reinsurance.dev/toolkit/trials/#the-yelt): it consumes the YELT's rows (one per occurrence, cedent, geography, and line of business) and produces rows at the same resolution. The two excess terms act on totals and [back-allocate](https://reinsurance.dev/glossary/#back-allocation) their gross to those rows, as the [occurrence excess](https://reinsurance.dev/financial-modelling/terms/occurrence-excess/) and [aggregate excess](https://reinsurance.dev/financial-modelling/terms/aggregate-excess/) pages work through, so any term can follow any other without an adapter. Order is part of the definition. What the order changes is the result, not whether the composition is valid: applying an occurrence limit before the cession is not the same as applying the cession first. A contract is such a [composition](https://reinsurance.dev/glossary/#composition), written $C = T_k \circ \cdots \circ T_1$ and read right to left: $T_1$ applies first. The [contract catalog](https://reinsurance.dev/financial-modelling/contracts/) lists the compositions the canonical contract types are built from; [Contracts as compositions](https://reinsurance.dev/financial-modelling/composition/) explains the algebra, and the conventions the terms rely on (contracts at 100%, claims-order erosion, the subject-side event limit) are indexed on [Scope, conventions & assumptions](https://reinsurance.dev/conventions/).