Replace a broken or superseded source without erasing its trail
When a source link breaks or a newer document appears, record the replacement relationship before changing citations. A moved copy, another format, a corrected version, and a later report are different cases. Keep the original reference so the evidence trail remains understandable.
W3C provenance provides background on derivation and relationships. The SEC filing guide helps locate referenced exhibits. The replacement log below is an original research method, not a rule that the newest available file should always supersede earlier material.
Identify why replacement is needed
An inaccessible URL may still refer to a valid source whose location changed. A corrected file may change the contents. A new annual report may describe a new period rather than replace the earlier one. Write the reason and relationship explicitly before updating the active citation.
If the original is locally preserved, keep it while investigating. If it is not, retain the known title, issuer, period, publication date, and old URL. Those fields help locate an official copy and distinguish it from a similar document. Do not let an attractive search result become the replacement without identity checks.
Hypothetical replacement log
Assume fictional Bracken Marine’s source link fails during a review. The example is invented.
| Candidate | Relationship to original | Action |
|---|---|---|
| Same report on another official path | Possible moved copy | Compare identity and relevant passage |
| HTML edition of original PDF | Different format | Preserve both file identities |
| Corrected project notice | Revised source | Inspect changed fields and dependencies |
| Following-year report | New period | Add source; do not call it the same report |
If the current task asks what was disclosed in the earlier year, a following-year report cannot silently replace the missing original. It can be a later source with its own role. The historical claim remains limited by whether the earlier evidence can be retrieved and checked.
Compare content relevant to the citation
For a moved copy, compare the cover and passage used by the note. For a new format, check whether tables, images, and footnotes survive. For a correction, use the stated scope and inspect the affected material. Record the comparison actually performed rather than writing “identical” after checking only a title.
If you cannot establish the relationship, mark the candidate provisional and keep the claim pending. A temporary access problem is inconvenient, but it is not a reason to substitute a different source that happens to support the same conclusion.
Update dependencies deliberately
Search for references to the old source ID. Update current notes where the new object is appropriate, preserving a replacement line with date and reason. Repair locators if format or pagination changed. Check event rows, excerpt cards, and review triggers as well as the main memo.
Historical snapshots may need to retain the earlier identity even when a new access route is supplied. Separate “new path to the same historical object” from “later source changing the evidence.” That distinction lets readers reconstruct both availability and current access without confusing the two.
Verification and limits
Follow one updated citation from note to manifest to source. Confirm that the expected passage and version appear. Then inspect the old row and verify that it points to the replacement relationship rather than disappearing. A reader should understand what changed without reading your private conversation history.
The log does not guarantee that an official host will preserve every historical version or that a candidate is complete. State unresolved access or comparison limits. Common mistakes include reusing an old source ID for new content, treating a later report as a replacement, and deleting the old URL. Preserve relationship history rather than a falsely clean archive.
A final record check
Check citation semantics after repairing the link. A working URL can still point to the wrong source role or period. Read the sentence using it and confirm that the replacement supports the same bounded claim. If the new source supports a different claim, revise the note transparently instead of treating the change as a purely technical link repair.
FAQ
Can I fix a broken URL without changing the source ID?
Yes, if it is established to be the same source object. Record the access-path change and the check that supports the match.
Should the newest document always become the active citation?
No. Select the source appropriate to the question, period, and cutoff. A newer publication can be related evidence without replacing the original.