cfb63bd22072217bc504665d8abeb5f81587c8d7
hiram
  Thu Sep 15 18:09:14 2016 -0700
better to call chromXref as chromAlias and now is a three column table with primary key refs #18027

diff --git src/hg/lib/chromAlias.as src/hg/lib/chromAlias.as
new file mode 100644
index 0000000..ee5f0ec
--- /dev/null
+++ src/hg/lib/chromAlias.as
@@ -0,0 +1,7 @@
+table chromAlias
+"correspondence of UCSC chromosome names to refseq, genbank, and ensembl names"
+    (
+    string alias;       "external name"
+    string chrom;       "UCSC genome browser chromosome name"
+    string source;      "comma separated list, when available: refseq,genbank,ensembl"
+    )