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Data Lake Schema Retrieval

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Easily access DLO and DMO schema from Salesforce Data Cloud.

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What Data Lake Schema Retrieval does

The Data Lake Schema Retrieval skill enables developers and data analysts to efficiently access and retrieve schema information for Data Lake Objects (DLOs) and Data Model Objects (DMOs) from Salesforce Data Cloud via REST APIs. This skill is essential for anyone working with Salesforce's data structures, allowing them to inspect field definitions, data types, and metadata associated with DLOs and DMOs. By providing a straightforward command-line interface, users can quickly gather insights into their data models without extensive manual effort.

To use this skill, users must have the Salesforce CLI installed and authenticated to the target org, which must have Data Cloud enabled. Once set up, users can easily list all DLOs or DMOs within their organization or retrieve detailed schema information for specific objects. This functionality is particularly useful for data exploration, validation, and understanding the structure of data before performing further operations such as querying or data manipulation.

The skill is executed through a series of Python scripts that are bundled within the package. Users can run commands to list all DLOs or DMOs, or request schema details for particular objects by providing their developer names. The output is formatted for clarity, presenting essential information such as field names, data types, and whether fields are nullable or primary keys. This structured approach helps users make informed decisions based on the data model's characteristics and constraints.

Overall, this skill is designed for data professionals who need a reliable and efficient method to access and understand the schema of their data models in Salesforce Data Cloud, making it an invaluable tool for data-driven projects.

When to use it

Use this skill when you need to explore or validate the schema of DLOs and DMOs in Salesforce Data Cloud.

When not to use it

This skill is not suitable for users without access to Salesforce Data Cloud or those who do not have the Salesforce CLI set up.

What you can build with it

Exploring Data Structures

A data analyst wants to understand the available DLOs and DMOs in their Salesforce Data Cloud org.

Validating Schema Details

A developer needs to verify the field definitions and data types of a specific DLO before writing queries.

Data Model Documentation

A data engineer is documenting the data model and needs to extract schema information for reporting.

How to install Data Lake Schema Retrieval

View source

1. Install with the skills CLI

npx skills add forcedotcom/sf-skills/data360-schema-get --agent claude-code

2. Or install it manually

Download the skill folder and drop it into ~/.claude/skills/ for all projects, or .claude/skills/ to scope it to one repo. Restart Claude Code so it picks up the new skill.

Anthropic's agentic coding CLI, and the reference implementation of Agent Skills. Drop a skill folder into ~/.claude/skills and Claude Code loads it automatically whenever a task matches the skill's description. Claude Code docs

Inside SKILL.md

Written by forcedotcom

data360-schema-get Skill

Overview

This skill retrieves Data Lake Object (DLO) and Data Model Object (DMO) schema information from Salesforce Data Cloud using the SSOT REST API. It can list all DLOs or DMOs in an org, or retrieve detailed schema for a specific DLO or DMO.

When to Use

  • User wants to see all DLOs or DMOs in a Data Cloud org
  • User needs field schema for a specific DLO or DMO
  • User is exploring Data Cloud data structures
  • User needs to understand DLO or DMO field types and metadata

Prerequisites

  • SF CLI installed and authenticated to target org
  • Org has Data Cloud enabled
  • User has appropriate Data Cloud permissions

Skill Execution

Parameters

  1. org_alias (required): The SF CLI org alias (e.g., 'afvibe', 'myorg')
  2. dlo_name (optional): Specific DLO developer name (e.g., 'Employee__dll')
  3. dmo_name (optional): Specific DMO developer name (e.g., 'Individual__dlm')

Step 1: Discover Connected Org

First, run sf org list to find out which org is connected and extract the alias to use for all subsequent calls:

sf org list

Example output:

┌────┬───────┬──────────────────────────┬────────────────────┬───────────┐
│    │ Alias │ Username                 │ Org Id             │ Status    │
├────┼───────┼──────────────────────────┼────────────────────┼───────────┤
│ 🍁 │ myorg │ chandresh@afvidedemo.org │ 00DKZ00000b80NT2AY │ Connected │
└────┴───────┴──────────────────────────┴────────────────────┴───────────┘

Extract the Alias value (e.g., myorg) from the output and use it as the <org_alias> for all subsequent calls. Use --all to see expired and deleted scratch orgs as well.

Step 2: Validate SF CLI Authentication

Before making API calls, verify the org is connected:

sf org display --target-org <org_alias> --json

If not connected, inform user to run:

sf org login web --alias <org_alias>

Step 3a: Execute DLO Schema Script

The Python scripts are bundled with this skill in the scripts/ subdirectory.

To list all DLOs:

python3 ./scripts/get_dlo_schema.py <org_alias>

To get specific DLO schema:

python3 ./scripts/get_dlo_schema.py <org_alias> <dlo_name>

Step 3b: Execute DMO Schema Script

To list all DMOs:

python3 ./scripts/get_dmo_schema.py <org_alias>

To get specific DMO schema:

python3 ./scripts/get_dmo_schema.py <org_alias> <dmo_name>

Step 4: Present Results

Parse and present the results in a user-friendly format:

For DLO List:

  • Show DLO name, label, category, and ID
  • Indicate total count
  • Highlight DLOs with data (totalRecords > 0)

For DLO Schema:

  • Show basic info (name, label, category, status)
  • List all fields with:
    • Field name
    • Data type
    • Primary key indicator
    • Nullable status
  • Highlight custom fields (exclude system fields like DataSource__c, cdp_sys_*)
  • Show record count if available

For DMO List:

  • Show DMO name, label, category, and ID
  • Indicate total count

For DMO Schema:

  • Show basic info (name, label, category, description)
  • List all fields with:
    • Field name
    • Data type
    • Primary key indicator
    • Nullable status
  • Show dataspace information if available

Step 5: Offer Next Steps

After displaying results, suggest relevant follow-up actions:

  • Query data from the DLO
  • Create calculated insights
  • Build segments
  • Set up data streams
  • Create DMO mappings

API Endpoints Used

List All DLOs

GET /services/data/v64.0/ssot/data-lake-objects

Response structure:

{
  "dataLakeObjects": [
    {
      "name": "Employee__dll",
      "label": "Employee",
      "category": "Profile",
      "id": "1dlXXXXXXXXXXXXXXX",
      "status": "ACTIVE",
      "totalRecords": 12,
      "fields": [...]
    }
  ],
  "totalSize": 5
}

Get DLO Schema

GET /services/data/v64.0/ssot/data-lake-objects/{dlo_name}

Response structure (same as individual object in list response, but wrapped in paginated format).

List All DMOs

GET /services/data/v64.0/ssot/data-model-objects

Response structure:

{
  "dataModelObjects": [
    {
      "name": "Individual__dlm",
      "label": "Individual",
      "category": "Profile",
      "id": "0dmXXXXXXXXXXXXXXX",
      "fields": [...]
    }
  ],
  "totalSize": 10
}

Get DMO Schema

GET /services/data/v64.0/ssot/data-model-objects/{dmo_name}

Response structure (same as individual object in list response, but wrapped in paginated format).

Error Handling

Common Issues:

  1. Org not connected

    • Message: "Org not connected"
    • Solution: Ask user to authenticate via SF CLI
  2. DLO not found

    • Message: "DLO 'XYZ__dll' not found"
    • Solution: List all DLOs first to verify name
  3. DMO not found

    • Message: "DMO 'XYZ__dlm' not found"
    • Solution: List all DMOs first to verify name
  4. Permission issues

    • Message: HTTP 403 errors
    • Solution: Verify user has Data Cloud permissions
  5. API version mismatch

    • Current: v64.0
    • Solution: Script can be updated for newer API versions

Example Usage

Example 1: List all DLOs

User: "Show me all DLOs in afvibe org"

Response:
1. Run sf org list to discover connected org alias
2. Authenticate to afvibe
3. Run: python3 ./scripts/get_dlo_schema.py afvibe
4. Display formatted list of DLOs

Example 2: Get specific DLO schema

User: "Get the schema for Employee__dll in afvibe"

Response:
1. Run sf org list to discover connected org alias
2. Authenticate to afvibe
3. Run: python3 ./scripts/get_dlo_schema.py afvibe Employee__dll
4. Display field schema with types and metadata

Example 3: Explore DLOs then get schema

User: "What DLOs exist in myorg and show me the schema for the Employee one"

Response:
1. Run sf org list to discover connected org alias
2. List all DLOs in myorg
3. Identify Employee__dll
4. Get detailed schema for Employee__dll
5. Present both results

Example 4: List all DMOs

User: "Show me all DMOs in afvibe org"

Response:
1. Run sf org list to discover connected org alias
2. Authenticate to afvibe
3. Run: python3 ./scripts/get_dmo_schema.py afvibe
4. Display formatted list of DMOs

Example 5: Get specific DMO schema

User: "Get the schema for Individual__dlm in afvibe"

Response:
1. Run sf org list to discover connected org alias
2. Authenticate to afvibe
3. Run: python3 ./scripts/get_dmo_schema.py afvibe Individual__dlm
4. Display field schema with types and metadata

Example 6: Explore DMOs then get schema

User: "What DMOs exist in myorg and show me the schema for the Individual one"

Response:
1. Run sf org list to discover connected org alias
2. List all DMOs in myorg
3. Identify Individual__dlm
4. Get detailed schema for Individual__dlm
5. Present both results

Output Format

DLO List Output

Found 5 DLOs in org 'afvibe':

1. DataCustomCodeLogs__dll
   Label: DataCustomCodeLogs
   Category: Engagement
   Records: 233

2. Employee__dll
   Label: Employee
   Category: Profile
   Records: 12

[...]

DLO Schema Output

DLO: Employee__dll
Label: Employee
Category: Profile
Status: ACTIVE
Records: 12

Custom Fields:
  • id__c (Text) - Primary Key
  • name__c (Text)
  • position__c (Text)
  • manager_id__c (Number)

System Fields:
  • DataSource__c (Text)
  • InternalOrganization__c (Text)
  • cdp_sys_SourceVersion__c (Text)

Next steps:
- Query data: SELECT * FROM Employee__dll LIMIT 10
- Create segment based on position field
- Set up data stream for real-time updates

DMO List Output

Found 10 DMOs in org 'afvibe':

1. Individual__dlm
   Label: Individual
   Category: Profile

2. ContactPointEmail__dlm
   Label: Contact Point Email
   Category: Profile

[...]

DMO Schema Output

DMO: Individual__dlm
Label: Individual
Category: Profile
Description: Represents an individual person

Fields:
  • Id__c (Text) - Primary Key
  • FirstName__c (Text)
  • LastName__c (Text)
  • BirthDate__c (DateTime)

Next steps:
- Query data: SELECT * FROM Individual__dlm LIMIT 10
- View DLO mappings to this DMO
- Create calculated insights

Notes

  • DLO names always end with __dll suffix
  • DMO names always end with __dlm suffix
  • Field names always end with __c suffix
  • System fields (DataSource__c, KQ_, cdp_sys_) are automatically added
  • Primary key fields are required for DLO and DMO queries
  • API supports pagination (limit/offset) for large result sets

Related Skills

  • datakit_workflow: For DMO mapping operations
  • datakit_validation: For validating datakit configurations
  • Use this skill before creating DMO mappings to understand source DLO structure

Frequently asked questions about Data Lake Schema Retrieval

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