---
category: [Administration & Integrations, Platform and Product Extensions, Platform and Product Extensions/Integration, Administration & Integrations/Custom Integrations & Apps, Platform and Product Extensions/Workday Extend]
keyword: [Extend, Model Components, Limits]
nav: wcp_docs
parent_url: /wcp_docs/
title: >- 
  Reference: Limits on Model Components
layout: subsection
---

## <a id="limitsonapps"></a>Limits on Apps

<table><thead><tr><th>Model Component</th><th>Limit</th></tr></thead><tbody><tr><td>Number of business objects.</td><td>20 per app.</td></tr><tr><td>Number of security domains.</td><td>10 per app.</td></tr><tr><td>Number of business processes.</td><td>5 per app.</td></tr><tr><td>Number of attachments.</td><td>5 per app.</td></tr><tr><td>Number of tasks.</td><td>20 per app.</td></tr><tr><td>Number of reports.</td><td>10 per app.</td></tr><tr><td>Number of <code>TEXT</code> fields that are enabled for search in prompts.</td><td>3 per app.</td></tr><tr><td>Number of <code>SINGLE_INSTANCE</code> and <code>MULTI_INSTANCE</code> fields where the target is a Workday-delivered business object.</td><td>25 per app.</td></tr><tr><td>Number of <code>SINGLE_INSTANCE</code> fields where <code>enableReportingFromTarget</code> is set to <code>true</code>.</td><td>5 per app.</td></tr></tbody></table><br/>

## <a id="limitsonfieldsformodcomps"></a>Limits on Fields for All Model Components

<table><thead><tr><th>Field</th><th>Limit</th></tr></thead><tbody><tr><td><code>name</code></td><td>100 characters.</td></tr><tr><td><code>id</code></td><td>Zero to Short.MAX_VALUE (32767).</td></tr><tr><td><code>label</code></td><td>150 characters.</td></tr></tbody></table><br/>

## <a id="limitsonbusobjs"></a>Limits on Business Objects

<table><thead><tr><th>Description</th><th>Limit</th></tr></thead><tbody><tr><td>Number of instances (Extend Core and Legacy SKUs).</td><td><p>10 million instances per tenant, excluding deleted instances. This limit is shared across all Extend business objects and attachment objects in the tenant.</p> <p>When you delete instances, they will no longer appear on the <b>Purge Summary Report</b>.</p> <p>To display the instance count for Extend business objects and attachments in a tenant, access the <b>Extend Object Instance Count</b> report, secured by the <i>Manage: App Manager</i> domain in the System functional area.</p></td></tr><tr><td>Number of instances (Extend Professional SKU).</td><td><p>100 million instances per tenant, excluding deleted instances. This limit is shared across all Extend business objects and attachment objects in the tenant.</p> <p>When you delete instances, they will no longer appear on the <b>Purge Summary Report</b>.</p> <p>To display the instance count for Extend business objects and attachments in a tenant, access the <b>Extend Object Instance Count</b> report, secured by the <i>Manage: App Manager</i> domain in the System functional area.</p></td></tr><tr><td>Number of fields.</td><td>50 per business object.</td></tr><tr><td>Number of derived fields.</td><td>40 per business object.</td></tr><tr><td>Number of fields you can index.</td><td>5 per business object, in addition to <code>SINGLE_INSTANCE</code> fields that Extend indexes automatically. You can't index derived fields or <code>MULTI_INSTANCE</code> fields.</td></tr><tr><td>Number of <code>SINGLE_INSTANCE</code> and <code>MULTI_INSTANCE</code> fields.</td><td>10 per business object.</td></tr></tbody></table><br/>

## <a id="limitsonbps"></a>Limits on Business Processes

<table><thead><tr><th>Field</th><th>Limit</th></tr></thead><tbody><tr><td><code>description</code></td><td>500 characters.</td></tr></tbody></table><br/>

## <a id="limitsonattobj"></a>Limits on Attachment Objects

<table><thead><tr><th>Description</th><th>Limit</th></tr></thead><tbody><tr><td>Number of instances (Extend Core and Legacy SKUs).</td><td><p>10 million instances per tenant, excluding deleted instances. This limit is shared across all Extend business objects and attachment objects in the tenant.</p> <p>When you delete instances, they will no longer appear on the <b>Purge Summary Report</b>.</p> <p>To display the instance count for Extend business objects and attachments in a tenant, access the <b>Extend Object Instance Count</b> report, secured by the <i>Manage: App Manager</i> domain in the System functional area.</p></td></tr><tr><td>Number of instances (Extend Professional SKU).</td><td><p>100 million instances per tenant, excluding deleted instances. This limit is shared across all Extend business objects and attachment objects in the tenant.</p> <p>When you delete instances, they will no longer appear on the <b>Purge Summary Report</b>.</p> <p>To display the instance count for Extend business objects and attachments in a tenant, access the <b>Extend Object Instance Count</b> report, secured by the <i>Manage: App Manager</i> domain in the System functional area.</p></td></tr><tr><td>Number of fields you can index.</td><td>5 per attachment object, in addition to <code>SINGLE_INSTANCE</code> fields that Extend indexes automatically. You can't index derived fields or <code>MULTI_INSTANCE</code> fields.</td></tr><tr><td>Maximum size of attachment.</td><td>30 MB</td></tr></tbody></table><br/>

## <a id="limsonprofgro"></a>Limits on Profile Groups

<table><thead><tr><th>Description</th><th>Limit</th></tr></thead><tbody><tr><td>Number of model profile groups.</td><td>An app can have up to 10 model profile groups.</td></tr></tbody></table><br/>

## <a id="limitsondecfields"></a>Limits on Decimal Fields

<table><thead><tr><th>Description</th><th>Limit</th></tr></thead><tbody><tr><td>Number of decimal places.</td><td>10</td></tr></tbody></table><br/>

## <a id="limitsonintfields"></a>Limits on Integer Fields

<table><thead><tr><th>Description</th><th>Limit</th></tr></thead><tbody><tr><td>Number of digits.</td><td>99 (positive or negative).</td></tr></tbody></table><br/>

## <a id="limitsonderfields"></a>Limits on Derived Fields

<table><thead><tr><th>Description</th><th>Limit</th></tr></thead><tbody><tr><td>Length of expression.</td><td>1000 characters.</td></tr></tbody></table><br/>

### Related Information

[Concept: Related Business Objects in WQL](/wcp_docs/GUID-5295e235-6d69-4b80-ad51-510afbdfb853-enHYPHENus.html)

[Reference: Limits on Presentation Components](/wcp_docs/GUID-54854abf-9a2e-4788-8aa3-9a92ddf1e71e.html)

[Reference: Limits on Graph API](/wcp_docs/GUID-2c1bf9a6-e073-4a5c-a631-6467554546d1.html)