> ## Documentation Index
> Fetch the complete documentation index at: https://learn.nextedy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Reference

> **[Data Model Reference](data-model/index.md)** -- Entity types, relationships, properties, constraints, cardinality, link roles, permissions, and Polarion type mapping.

export const LastReviewed = ({date}) => {
  if (!date) return null;
  const formatted = new Date(`${date}T00:00:00Z`).toLocaleDateString("en-US", {
    year: "numeric",
    month: "long",
    day: "numeric",
    timeZone: "UTC"
  });
  return <p className="mt-10 text-sm text-gray-400 dark:text-zinc-500 not-prose">
      Last reviewed on {formatted}
    </p>;
};

## Data Model

**[Data Model Reference](/powersheet/reference/data-model/index)** -- Entity types, relationships, properties, constraints, cardinality, link roles, permissions, and Polarion type mapping.

* **[Data Model Types](/powersheet/reference/data-model/domainmodeltypes)** -- `domainModelTypes` property reference
* **[Relationships](/powersheet/reference/data-model/relationships)** -- Relationship definitions with cardinality and navigation
* **[Properties](/powersheet/reference/data-model/properties)** -- Entity type property definitions
* **[Constraints](/powersheet/reference/data-model/constraints)** -- Load, create, and pick constraint rules
* **[Cardinality](/powersheet/reference/data-model/cardinality)** -- Relationship multiplicity options
* **[Link Roles](/powersheet/reference/data-model/link-roles)** -- Polarion link role mapping
* **[Permissions](/powersheet/reference/data-model/permissions)** -- Entity and property-level access control
* **[Polarion Type Mapping](/powersheet/reference/data-model/polarion-mapping)** -- Entity to work item type mapping
* **[Navigation Directions](/powersheet/reference/data-model/navigation-directions)** -- Forward and reverse navigation properties

## Sheet Configuration

**[Sheet Configuration Reference](/powersheet/reference/sheet-config/index)** -- Column layout, views, styles, formatters, sources, and display options.

* **[Columns](/powersheet/reference/sheet-config/columns)** -- Column definitions and configuration
* **[Column Groups](/powersheet/reference/sheet-config/column-groups)** -- Visual grouping with collapse behavior
* **[Views](/powersheet/reference/sheet-config/views)** -- Named column visibility presets
* **[Styles](/powersheet/reference/sheet-config/styles)** -- Custom style definitions
* **[Formatters](/powersheet/reference/sheet-config/formatters)** -- Conditional formatting rules
* **[Sources](/powersheet/reference/sheet-config/sources)** -- Data source query definitions
* **[Sort By](/powersheet/reference/sheet-config/sortby)** -- Default sort order configuration
* **[Display Property](/powersheet/reference/sheet-config/display-property)** -- Display format options
* **[Render Property](/powersheet/reference/sheet-config/render-property)** -- Custom render configurations
* **[Binding Syntax](/powersheet/reference/sheet-config/binding-syntax)** -- Dot-notation binding path reference
* **[Multi-Item Columns](/powersheet/reference/sheet-config/multi-item-columns)** -- Multi-reference column configuration

## Query API

**[Query API Reference](/powersheet/reference/query-api/index)** -- Entity queries, predicates, operators, expansion, and filtering.

* **[EntityQuery](/powersheet/reference/query-api/entity-query)** -- Query structure and execution
* **[Predicates](/powersheet/reference/query-api/predicates)** -- Filter predicate types and operators
* **[Expand Clause](/powersheet/reference/query-api/expand-clause)** -- Navigation property expansion
* **[Query Context](/powersheet/reference/query-api/query-context)** -- Context parameters
* **[Document Filtering](/powersheet/reference/query-api/document-filtering)** -- Document-scoped queries
* **[Baseline and Revision Queries](/powersheet/reference/query-api/baseline-and-revision-queries)** -- Historical data queries

## Server Rendering

* **[Velocity Templates](/powersheet/reference/server-rendering/velocity-templates)** -- Server-side template rendering
* **[Context Variables](/powersheet/reference/server-rendering/context-variables)** -- Available template variables
* **[Polarion Services](/powersheet/reference/server-rendering/polarion-services)** -- Accessible Polarion services
* **[JavaScript Functions](/powersheet/reference/server-rendering/javascript-functions)** -- Client-side functions

## Field Types

**Field Types** -- Reference for Nextedy POWERSHEET field type handling and conversion.

* **[Type Conversion](/powersheet/reference/field-types/type-conversion)** -- Automatic type mapping

## Example Models

**[Example Models Reference](/powersheet/reference/example-models/index)** -- Complete working data model examples.

* **[RTM Model](/powersheet/reference/example-models/rtm-model)** -- Requirements Traceability Matrix
* **[Risk Management Model](/powersheet/reference/example-models/risk-management-model)** -- Risk analysis model

<Tip title="Start with concepts">
  If you are new to Powersheet configuration, read the [Concepts](/powersheet/concepts/index) section first to understand the architecture before diving into property-level reference details.
</Tip>

<LastReviewed date="2026-07-02" />