fix(docs): include a note about anchor-to-file childof edges (#5007)

kythe · Aug 2, 2021 · 98391d0 · 98391d0
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commit 98391d0
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diff --git a/kythe/docs/schema/schema.txt b/kythe/docs/schema/schema.txt
@@ -256,6 +256,11 @@ Points toward::
   semantic nodes
 Ordinals are used::
   never
+Notes::
+  <<anchor>>s should not be `childof` the <<file>> in which they reside.  As an
+  optimization due to the overwhelming number of such edges, the parentage
+  relationship between these nodes is determined by the shared `corpus`,
+  `path`, and `root` VName fields.
 
 [kythe,C++,"Enumerators are children of enumerations."]
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