> ## Documentation Index > Fetch the complete documentation index at: https://developers.pleo.io/llms.txt > Use this file to discover all available pages before exploring further. # Overview The rules and requirements for building accounting integrations with Pleo. These pages explain what your integration must do, how to handle each scenario, and what Pleo expects. Select a section to get started. ## Exports ### Level 1: Expense Items Exporting The foundation for all integration levels. Understand how to detect and process export jobs from Pleo and post expense data to your Accounting System, including bookkeeping method resolution, accounts mapping, data mapping, and attachment handling.
The execution model, job lifecycle, and requirements for the full export workflow.
How to detect when export jobs are available in Pleo and start them correctly.
The validation rules your integration must apply before fetching and processing export items.
How to retrieve the list of export items from Pleo for a given export job.
How to fetch the full expense data for each export item, including line items and metadata.
The rules for resolving bookkeeping methods, mapping accounts and data, handling attachments, and applying posting behaviour.
How and when to update the status of individual export items during processing.
How to mark export items as processed and complete the export job in Pleo.
 ## Imports ### Level 2: Tags Sync Understand how to sync Accounting Dimensions from your Accounting System into Pleo as Tags, so bookkeepers can assign the correct dimensions to expenses before export. Covers Dimension selection, Tag Group and Tag reconciliation, data mapping, and scheduling.
The execution model, reconciliation behaviour, and implementation requirements for Tags Sync.
The rules for selecting which Accounting Dimensions to sync, including auto-selection logic and limits.
The reconciliation rules for keeping Tag Groups in Pleo aligned with selected Dimensions.
The reconciliation rules for keeping Tags in Pleo aligned with Dimension Values from the AS.
How to map Accounting Dimension data from your AS to Pleo's Tags API fields.
When Tags Sync runs, how it is triggered, and the rate limit constraints to respect.
 ### Level 3: Chart of Accounts Sync Understand how to sync the Chart of Accounts from your Accounting System into Pleo, so bookkeepers can assign the correct accounts to expense categories before export. Covers the reconciliation model, matching by externalId, create/update/archive operations, data mapping, and scheduling.
The execution model, reconciliation behaviour, and implementation requirements for Chart of Accounts Sync.
The reconciliation algorithm for creating, updating, unarchiving, and archiving Accounts in Pleo.
How to map Chart of Accounts data from your AS to Pleo's Chart of Accounts API fields.
When Chart of Accounts Sync runs, how it is triggered, and the rate limit constraints to respect.