huaxingao commented on code in PR #14250:
URL: https://github.com/apache/iceberg/pull/14250#discussion_r2407186499


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format/spec.md:
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@@ -713,7 +715,9 @@ Examples of valid field paths using normalized JSON path 
format are:
 * `$['tags']` -- the `tags` array 
 * `$['addresses']['zip']` -- the `zip` field in an `addresses` array that 
contains objects
 
-For `geometry` and `geography` types, `lower_bounds` and `upper_bounds` are 
both points of the following coordinates X, Y, Z, and M (see [Appendix 
G](#appendix-g-geospatial-notes)) which are the lower / upper bound of all 
objects in the file. For the X values only, xmin may be greater than xmax, in 
which case an object in this bounding box may match if it contains an X such 
that `x >= xmin` OR`x <= xmax`. In geographic terminology, the concepts of 
`xmin`, `xmax`, `ymin`, and `ymax` are also known as `westernmost`, 
`easternmost`, `southernmost` and `northernmost`, respectively. For `geography` 
types, these points are further restricted to the canonical ranges of [-180 
180] for X and [-90 90] for Y.
+For geometry and geography types, lower_bounds and upper_bounds are both 
points of the following coordinates X, Y, Z, and M (see Appendix G) which are 
the lower / upper bound of all objects in the file.

Review Comment:
   nit: backtick the keyword? 
   For `geometry` and `geography` types, `lower_bounds` and `upper_bounds` are 
both points of the following coordinates X, Y, Z, and M (see Appendix G) which 
are the lower / upper bound of all objects in the file.



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