Github user mattf-horton commented on a diff in the pull request:
https://github.com/apache/metron/pull/650#discussion_r129375098
--- Diff: metron-stellar/stellar-common/README.md ---
@@ -581,6 +634,24 @@ In the core language functions, we support basic
functional programming primitiv
* group - The integer that selects what group to select, starting at 1
* Returns: The value of the group, or null if not matched or no group at
index.
+### `ROUND`
+ * Description: Rounds a number to the nearest integer
+ * Input:
+ * number - The number to round
+ * Returns: The nearest integer.
+
+### `SIN`
+ * Description: Returns the `sin` of a number.
--- End diff --
Returns the sine of a number.
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