---
schema_version: "1"
id: 93d0a361eb53493deeef947a21c4a2c28718afe34175c82e01e41c121dab29b6
title: Review Objects in the Base Semantic Model (Beta)
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/analytics/264-0-0/bi_analytics_metadata_bridge_extend_review_existing.md
canonical_url: https://help.salesforce.com/s/articleView?id=analytics.bi_analytics_metadata_bridge_extend_review_existing.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: ad500b718b4fcbb54c9860d25c4c5d6f88b24190095cd4d3eaa82a81b4d289ea
description: During field mapping, the CRM Analytics Metadata Bridge shows source objects that are already in the base semantic model so you can focus on the objects that the extend flow adds.
products:
  - CRM Analytics
  - Cross Cloud
release: "264"
---
# Review Objects in the Base Semantic Model (Beta)

During field mapping, the CRM Analytics Metadata Bridge shows source objects that are already in the base semantic model so you can focus on the objects that the extend flow adds.

![Note](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-analytics-bi-264-0-0-production-enus/ec791473-f5b4-4f64-a656-9104f455d966/images/icon_note.png)

Note This feature is a pilot or beta service that is subject to the Beta Services Terms at [Agreements - Salesforce.com](https://www.salesforce.com/company/legal/) or a written Unified Pilot Agreement if executed by Customer, and applicable terms in the [Product Terms Directory](https://ptd.salesforce.com/). Use of this pilot or beta service is at the Customer’s sole discretion.

When you extend an existing semantic model, the CRM Analytics Metadata Bridge doesn't re-ingest source objects that the base semantic model already covers. At each field mapping step, the bridge separates source objects into two groups so that you know what's new and what already exists.

## Field Mapping and Data Lake Object Generation

On the DLO mapping step, the bridge shows:

- **Mapped** - source objects that need a DLO created or an existing DLO mapping confirmed for the extended semantic model.
- **Already in the Semantic Layer** - source objects that the base semantic model already includes. These entries are read-only, and the bridge doesn't create new DLOs for them.

![Selecting source objects to map to the data lake objects](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-analytics-bi-264-0-0-production-enus/ec791473-f5b4-4f64-a656-9104f455d966/bi/images/bi/bi_analytics_metadata_bridge_extend_sm_field_mapping_dlo.png)

Complete DLO setup for the source objects listed in **Mapped** and on the **Require Action** tab, and then continue to DMO mapping. See [Map Fields and Generate Data Lake Objects](https://help.salesforce.com/s/articleView?id=analytics.bi_analytics_metadata_bridge_map_fields_dlo.htm&language=en_US) for the shared steps.

## Field Mapping and Data Model Object Generation

On the DMO mapping step, the bridge shows the same two groups:

- **Mapped** - source objects that need a DMO mapping for the extended semantic model.
- **Already in the Semantic Layer** - source objects mapped to DMOs in the base semantic model. The bridge indicates whether each existing DMO is **Standard** or **Custom**. These entries are read-only.

![Selecting source objects to map to the data model objects](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-analytics-bi-264-0-0-production-enus/ec791473-f5b4-4f64-a656-9104f455d966/bi/images/bi/bi_analytics_metadata_bridge_extend_sm_field_mapping_dmo.png)

Confirm the target DMOs for the source objects listed in **Mapped**, complete DMO setup for any objects on the **Require Action** tab, and continue to the semantic model generation step. See [Map Fields and Generate Data Model Objects](https://help.salesforce.com/s/articleView?id=analytics.bi_analytics_metadata_bridge_map_fields_dmo.htm&language=en_US) for the shared steps.

Then, continue to [Generate the Extended Semantic Model (Beta)](https://help.salesforce.com/s/articleView?id=analytics.bi_analytics_metadata_bridge_extend_generate.htm&language=en_US)