A photo library can contain bowl, bowls, pottery and ceramic bowl without making clear whether those labels mean the same thing. Adding more words will not necessarily solve the problem. A short dictionary that explains when to use each label can make future tagging more consistent.
The aim is to describe photographs in a way you can repeat. Start with the subjects you actually need to retrieve, choose a preferred label for each, and write down the difficult boundaries before applying those labels across the library.
Separate the label from its rule
IPTC describes keywords as terms that support finding images and can describe visible content or associated concepts. A keyword alone, however, does not explain why you applied it. Your working dictionary supplies that explanation.
For each proposed label, record four things: its preferred spelling, what qualifies, what does not qualify, and any older wording you plan to review. Keep this dictionary in a short note beside the library. It need not be a complicated database.
Use a fictional ceramics studio as an example. The studio wants to retrieve photographs by the main object and by whether the image shows a complete object or a detail. It defines the following labels:
- Bowl: A bowl is a main subject, identified from the image or a reliable studio item record. A bowl appearing only as a background prop does not qualify.
- Mug: A mug is a main subject under the same rule. Do not infer that an unfamiliar cropped object is a mug because a handle might be outside the frame.
- Whole item: At least one main object is fully within the frame, with its overall form visible. This does not promise that every surface or the underside is shown.
- Detail: The photograph concentrates on a feature, such as a rim, texture or maker's mark, rather than presenting the overall object.
These are local working definitions, not a universal classification system. In this dictionary, Whole item and Detail describe the photograph's purpose. A close camera position alone does not make an image a detail photograph.
Apply the rules to awkward examples
Start with a few photographs that could expose disagreement, rather than only the easiest pictures.
- Photo A: A complete bowl is the clear subject; an unrelated mug sits blurred in the background. Apply Bowl and Whole item. Do not apply Mug under this studio's main-subject rule.
- Photo B: A tight photograph shows only a bowl's patterned rim. The linked studio record identifies the item as a bowl. Apply Bowl and Detail, even though the whole object is not visible.
- Photo C: A close-up shows an unidentified ceramic surface. Apply Detail, leave the object label unset, and note that identification is unresolved. A plausible guess is not a confirmed label.
- Photo D: A complete bowl and a complete mug are presented together as equal subjects. Apply Bowl, Mug and Whole item. The dictionary permits more than one object label.
If a photograph mixes a complete object with a separate enlarged detail, decide how that layout should be treated before labeling similar images. You might allow both view labels for that particular case. Record the exception so it does not quietly turn into a different rule for each session.
Keep visible description separate from unsupported inference
A shiny surface does not, by itself, establish a production stage, material or finish. If those facts matter, use the studio's reliable item record and preserve the connection to it. Otherwise leave the uncertain fact out of the keywords and keep a review note.
Known context can still be useful. A documented collection name can help retrieve related photographs even when the name is not visible in the image. Write down where that association came from. Do not use an attractive descriptive word as a substitute for confirming the item.
Resolve aliases without erasing distinctions
The studio chooses Bowl as its preferred spelling and records bowls as an older label to review. It does not automatically merge pottery into Bowl: pottery could refer to a mug, a plate or another object.
Likewise, cup and mug should not become interchangeable merely because someone used both casually. Inspect the affected photographs and decide whether the labels actually describe the same intended group.
Some software supports keyword synonyms and hierarchies. Adobe documents those features for Lightroom Classic, but a handwritten alias list does not make another application interpret those relationships. Confirm the behavior in your own tool with a small sample before depending on it.
Test the dictionary before broad cleanup
Apply the draft rules to a small, varied sample. Later, label that sample again without looking at the earlier choices, or ask a colleague to use the dictionary independently. Compare the disagreements. Revise the definition that caused each mismatch rather than inventing another label immediately.
Before changing existing labels in bulk, preserve the current assignments in a form your tool can restore or let you review. Work on one clearly defined label group, inspect the result and confirm that familiar photographs remain findable. Keep the dictionary's revision date so later decisions have a reference point.
Keywords describe and help retrieve images. They do not replace photo backups or control who can access a shared file. A useful keyword dictionary succeeds when the same photograph receives the same justified labels on a different day.
