howto:post relationships (deleted)
Parent and Child Posts Guidelines
Parent and Child Posts, also known as Post Relationships are a means of keeping similar looking posts together.
When TO use Post Relationships
Post Relationships are used to keep variations of a post linked together. Typical scenarios where Post Relationships are used include:
- When the same image is available in multiple resolutions or pixel sizes (see post #716608).
- When cropped and whole versions of the same image has been uploaded (see post #1540326)
- Derivatives of a Post, including setting variations (post #1544682) and costume variations (post #154471). See also post #625848 (hard translation and derivative character art) and post #55525 (smaller post and vector trace).
- When identical images from different sources have been uploaded, whichever was the original, unaltered version from the artist is the parent. Especially interesting since Pixiv runs uploaded JPEGs through the jpegtran optimizer (since August 2013) that reduces filesize by stripping metadata. In those cases, the Pixiv image should be the child (see post #1502515).
When NOT to use Post Relationships
For most other cases, it would be better to organize these images into a Pool. Examples include:
- Pages from a manga or doujin.
- Episodes of a comic.
- Any other series of posts intended to be viewed in order.
- Large collections of posts that are too different from each other.
In such cases, Pools provide additional navigation features not available with Post Relationships.
Choosing the Best Parent
The Parent Post should be considered in this order:
- Most recent version (revision > non-revision). See also MD5 mismatch.
- Most original, as opposed to confirmed derivatives.
- Most exploitable variation of the post for creating derivatives.
- Most complete, as opposed to cropped posts.
- Least image artifacts (see jpeg_artifacts, scan_artifacts).
- Highest resolution.
- Cleanest, containing the least watermarking.
There might be exceptions with the above, for example if a picture is much higher resolution than its counterpart. If you are unsure which version should be the Parent, leave a comment on that Post or ask in the Forum.
See Also
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