---
title: SAIF.Services.ClaimInfoApi.Core overview
summary: High-level purpose, scope, and responsibilities for this library.
status: draft
owner: SAIF.Core Documentation Team
last_reviewed: 2026-09-24
library: SAIF.Services.ClaimInfoApi.Core
reference_type: package
---

# SAIF.Services.ClaimInfoApi.Core overview

> **Documentation context:** Packaged Component (NuGet)

SAIF.Services.ClaimInfoApi.Core is a small, self-contained .NET Framework 4.6.2 class library that implements a metadata-driven notification rule engine, evaluating caller-supplied `NotificationRule` definitions against an arbitrary model type at run time by compiling LINQ expression trees on demand, with no I/O, persistence, configuration, logging, or security code of its own.

## Purpose
- Evaluate a set of `NotificationRule` definitions grouped in a `NotificationMatrix` against a caller-supplied model instance of any type `T`, producing zero or more `NotificationResult` values, one per distinct rule position (`NotificationRuleEngine.CalculateNotifications<T>`, [OP-CIA-01](operations-processes.md#operation-catalog)).
- Resolve each rule's evaluation type from string metadata (`TypeName`) and dispatch to an `int`, `bool`, or string evaluation path, including recursive out-property resolution for conditional rules ([OP-CIA-02](operations-processes.md#operation-catalog)).
- Compile a rule's member name, operator name, and target value into a LINQ expression tree and a runnable delegate on every invocation ([OP-CIA-03](operations-processes.md#operation-catalog)).
- Provide the only supported construction path for `NotificationRule` instances through four static factory methods, since the type's constructor is private ([OP-CIA-04](operations-processes.md#operation-catalog)).
- Consumers supply both the model and the rule matrix; this library performs no data access or configuration lookup of its own — the source of a populated `NotificationMatrix` (for example an OnBase notification-matrix store) is not visible from this library**.

## Responsibilities
- Hold and expose rule metadata (`NotificationMatrix`, `NotificationRule`) as plain configuration DTOs.
- Compile and execute rule expressions against an arbitrary model type using reflection and `System.Linq.Expressions`.
- Produce `NotificationResult` values that pair the evaluated rule with its string output.

## Key components
- `NotificationMatrix`: configuration DTO grouping `NotificationRule` entries under a composite `"{DocType}:{SubType}"` key.
- `NotificationRule`: an immutable-by-construction rule definition, created only through its static factories.
- `NotificationRuleEngine`: the static evaluation and expression-compilation engine; holds no instance state.
- `NotificationResult`: a DTO pairing a `NotificationRule` with its evaluated string value.

## Related documentation
- [Index](index.md)
- [Architecture](architecture.md)
- [Dependencies](dependencies.md)
- [Operations and processes](operations-processes.md)
- [Business rules](business-rules.md)
- [API reference](api/index.md)

> **Note:** Statements marked with `**` could not be confirmed; treat as unknown until verified.

## Sources
- `Services/SAIF.Services.ClaimInfoApi.Core/SAIF.Services.ClaimInfoApi.Core.csproj`
- `Services/SAIF.Services.ClaimInfoApi.Core/NotificationMatrix.cs`
- `Services/SAIF.Services.ClaimInfoApi.Core/NotificationRule.cs`
- `Services/SAIF.Services.ClaimInfoApi.Core/NotificationRuleEngine.cs`
- `Services/SAIF.Services.ClaimInfoApi.Core/NotificationRuleResult.cs`