Where Does an IPTC Product Caption Lose Its Ending?

Follow one value through three stages

Keep the approved caption in a separate editorial record. Then compare that text with the value read from a working image after writing, and with what the catalog displays. Use the same file and field throughout. A title shown in an application is not necessarily its IPTC caption, so establish which metadata field the receiving system actually consumes before drawing conclusions.

If the written field already lacks the ending, investigate the write operation and its warning. If the written value is complete but the receiving view is shortened, the first failing stage is later. Repeatedly rewriting the image cannot establish what the catalog does with a complete value.

Check the field rather than a universal caption allowance

ExifTool’s IPTC tag table lists writable lengths next to individual fields. The notation can show a minimum and maximum; different fields do not share one universal allowance. Consult the exact field used by your workflow. A successful read is not a capacity test: ExifTool can read IPTC values longer than its normal writing rules permit.

A concrete example is Caption-Abstract, tag 120 in the ApplicationRecord table, whose Writable entry is string[0,2000]. The brackets give the documented field-length range. This is not a universal caption allowance, a promise of 2,000 arbitrary Unicode characters, or a receiving catalog specification. Record the exact tag and encoding used by the actual workflow rather than applying this number to every text field.

Do not treat IgnoreMinorErrors as a general repair. The documentation says longer values written after ignoring the warning may cause problems for other IPTC readers. Suppressing the warning changes the write decision; it does not establish end-to-end compatibility. Keep rights and attribution fields in their proper roles rather than using them as overflow space for sales copy.

Verify the Caption-Abstract entry and writing warnings in the ExifTool IPTC tag table.

Locate the First Difference in the Actual Value

Follow one working file through the record below. Preserve the complete approved wording outside the image; copy the exact field identifier and raw write warning into the handoff. After writing, read that same field from the output and compare it with both the approved value and the receiving view.

If the field is already shortened after a length warning, the evidence points to a write-stage failure. Approve an intentional shorter field value and inspect a fresh output. If the field is complete but the receiving view is shortened, keep the image evidence and establish that application’s mapping or display rule. Unknown mapping remains unresolved; it is not proof of a cache fault.

Approve an intentional short version

A shortened caption is an editorial change. Compare it against the approved product facts so that a cut does not remove a limitation or turn a conditional statement into a broader claim. Do not restore missing words by guessing from the product image. Record the intentionally retained text and the full source separately.

Stop when the required field survives a fresh write and read, and its use in the intended receiving system has been checked. If the receiving system’s field mapping remains unknown, record that stage as unresolved. This worksheet is a manual handoff tool; it is not an executed ExifTool test or proof that a storefront indexes embedded captions.

IPTC caption loss-location record — complete from actual files

Save a copy of this record and enter actual inputs, actions and observations. Keep incomplete checks pending; do not prefill success.

Download review worksheet (CSV)