Description
Split image and tag using the last colon after the last slash.
Package and container references combine names, selectors, conditions and platform metadata. A restricted lexical split can preserve these parts without validating registry identity, available targets, dependency graphs or runtime resolution.
Split image and tag using the last colon after the last slash.
When to use this tool
Use Docker Image Tag Colon Boundary when checking the stated package, Cargo or container-reference component.
How to use the tool and how it works
- Enter reference. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read image, tag, tagged. Inspect tagged before interpreting the associated values.
Split image and tag using the last colon after the last slash. Require nonempty whitespace-free reference without @; return tagged and tag, or an empty tag if no such colon.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| reference | Reference | Required. Text; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| image | Image | Required. Text; maximum UTF-16 length 8192. |
| tag | Tag | Required. Text; maximum UTF-16 length 8192. |
| tagged | A colon exists after the final slash; a trailing colon can still yield an empty tag. | Required. Boolean. |
{
"input": {
"reference": "localhost:5000/app:latest"
},
"output": {
"image": "localhost:5000/app",
"tag": "latest",
"tagged": true
}
}Limitations and assumptions
- A trailing colon produces an empty tag with tagged = true; full reference grammar and registry lookup are omitted.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Alternative or Complementary methods
Use the relevant package manager, runtime or registry against the actual project for complete resolution and validation.
References
Similar or alternative tools
- Docker Image Digest Algorithm Split
Split a digest-qualified image reference.
- Docker Platform Os Architecture Pair
Split a restricted container platform string.