---
id: retrieval-document-versioning-and-source-snapshots
title: 'Retrieval Document Versioning and Source Snapshots'
schema_type: TechArticle
category: ai
language: en
confidence: medium
last_verified: '2026-06-07'
created_date: '2026-06-07'
generation_method: ai_structured
derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-ai-retrieval-document-versioning-and-source-snapshots-1
    statement: >-
      LlamaIndex document management documentation describes tracking document hashes to determine
      whether documents have changed.
    source_title: LlamaIndex Document Management
    source_url: https://developers.llamaindex.ai/python/framework/module_guides/indexing/document_management/
    confidence: medium
  - id: fact-ai-retrieval-document-versioning-and-source-snapshots-2
    statement: >-
      Elasticsearch point-in-time documentation describes a point in time as a lightweight view
      into the state of data as it existed when the point in time was initiated.
    source_title: Elasticsearch Point in Time API
    source_url: https://www.elastic.co/guide/en/elasticsearch/reference/current/point-in-time-api.html
    confidence: medium
  - id: fact-ai-retrieval-document-versioning-and-source-snapshots-3
    statement: >-
      W3C PROV-O documentation says PROV-O can represent and interchange provenance information
      generated by different systems and contexts.
    source_title: PROV-O The PROV Ontology
    source_url: https://www.w3.org/TR/prov-o/
    confidence: medium
completeness: 0.83
known_gaps:
  - Snapshot guarantees depend on crawler policy, document canonicalization, deletion handling, index refresh lag, and source-system retention.
  - This article does not define archival compliance for copyrighted or private source documents.
disputed_statements: []
primary_sources:
  - title: LlamaIndex Document Management
    type: documentation
    year: 2026
    url: https://developers.llamaindex.ai/python/framework/module_guides/indexing/document_management/
    institution: LlamaIndex
  - title: Elasticsearch Point in Time API
    type: documentation
    year: 2026
    url: https://www.elastic.co/guide/en/elasticsearch/reference/current/point-in-time-api.html
    institution: Elastic
  - title: PROV-O The PROV Ontology
    type: standard
    year: 2013
    url: https://www.w3.org/TR/prov-o/
    institution: W3C
secondary_sources: []
updated: '2026-06-07'
ai_models:
  - gpt-5-codex
---

## TL;DR

Retrieval systems need stable document IDs, version markers, and source snapshots so cited evidence can be traced back to the source state that was actually indexed.

## Core Explanation

A retrieval result is not just text. It is a claim about a source document at a specific time, under a specific parser, chunking policy, metadata schema, and index state. If the source changes after indexing, an agent can cite an outdated passage unless the system records document hashes, crawl timestamps, source URLs, and index version metadata.

For agent answers, the practical rule is to separate "current source" from "indexed source." If the indexed snapshot is old or the source has changed, the agent should expose that uncertainty rather than presenting the retrieval result as fresh evidence.

## Source-Mapped Facts

- LlamaIndex document management documentation describes tracking document hashes to determine whether documents have changed. ([source](https://developers.llamaindex.ai/python/framework/module_guides/indexing/document_management/))
- Elasticsearch point-in-time documentation describes a point in time as a lightweight view into the state of data as it existed when the point in time was initiated. ([source](https://www.elastic.co/guide/en/elasticsearch/reference/current/point-in-time-api.html))
- W3C PROV-O documentation says PROV-O can represent and interchange provenance information generated by different systems and contexts. ([source](https://www.w3.org/TR/prov-o/))

## Further Reading

- [LlamaIndex Document Management](https://developers.llamaindex.ai/python/framework/module_guides/indexing/document_management/)
- [Elasticsearch Point in Time API](https://www.elastic.co/guide/en/elasticsearch/reference/current/point-in-time-api.html)
- [PROV-O The PROV Ontology](https://www.w3.org/TR/prov-o/)