diff --git a/ChangeLog b/ChangeLog
index c3435904d96fbce03deee970fa2ef66020bd9be0..a07a40f9f35af26815c77654292c341f3cdb5890 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2021-05-03  Oliver Lemke  <olemke@core-dump.info>
+
+	* ARTS-XML-DATA-2-5-1
+
+	* Rename cat to Artscat
+
 2020-10-14  Oliver Lemke  <olemke@core-dump.info>
 
 	* ARTS-XML-DATA-2-5-0
diff --git a/spectroscopy/cat/C2H2-1221.xml b/spectroscopy/Artscat/C2H2-1221.xml
similarity index 100%
rename from spectroscopy/cat/C2H2-1221.xml
rename to spectroscopy/Artscat/C2H2-1221.xml
diff --git a/spectroscopy/cat/C2H2-1222.xml b/spectroscopy/Artscat/C2H2-1222.xml
similarity index 100%
rename from spectroscopy/cat/C2H2-1222.xml
rename to spectroscopy/Artscat/C2H2-1222.xml
diff --git a/spectroscopy/cat/C2H2-1231.xml b/spectroscopy/Artscat/C2H2-1231.xml
similarity index 100%
rename from spectroscopy/cat/C2H2-1231.xml
rename to spectroscopy/Artscat/C2H2-1231.xml
diff --git a/spectroscopy/cat/C2H4-221.xml b/spectroscopy/Artscat/C2H4-221.xml
similarity index 100%
rename from spectroscopy/cat/C2H4-221.xml
rename to spectroscopy/Artscat/C2H4-221.xml
diff --git a/spectroscopy/cat/C2H4-231.xml b/spectroscopy/Artscat/C2H4-231.xml
similarity index 100%
rename from spectroscopy/cat/C2H4-231.xml
rename to spectroscopy/Artscat/C2H4-231.xml
diff --git a/spectroscopy/cat/C2H6-1221.xml b/spectroscopy/Artscat/C2H6-1221.xml
similarity index 100%
rename from spectroscopy/cat/C2H6-1221.xml
rename to spectroscopy/Artscat/C2H6-1221.xml
diff --git a/spectroscopy/cat/C2H6-1231.xml b/spectroscopy/Artscat/C2H6-1231.xml
similarity index 100%
rename from spectroscopy/cat/C2H6-1231.xml
rename to spectroscopy/Artscat/C2H6-1231.xml
diff --git a/spectroscopy/cat/C4H2-2211.xml b/spectroscopy/Artscat/C4H2-2211.xml
similarity index 100%
rename from spectroscopy/cat/C4H2-2211.xml
rename to spectroscopy/Artscat/C4H2-2211.xml
diff --git a/spectroscopy/cat/CH3Br-211.xml b/spectroscopy/Artscat/CH3Br-211.xml
similarity index 100%
rename from spectroscopy/cat/CH3Br-211.xml
rename to spectroscopy/Artscat/CH3Br-211.xml
diff --git a/spectroscopy/cat/CH3Br-219.xml b/spectroscopy/Artscat/CH3Br-219.xml
similarity index 100%
rename from spectroscopy/cat/CH3Br-219.xml
rename to spectroscopy/Artscat/CH3Br-219.xml
diff --git a/spectroscopy/cat/CH3CN-211124.xml b/spectroscopy/Artscat/CH3CN-211124.xml
similarity index 100%
rename from spectroscopy/cat/CH3CN-211124.xml
rename to spectroscopy/Artscat/CH3CN-211124.xml
diff --git a/spectroscopy/cat/CH3Cl-215.xml b/spectroscopy/Artscat/CH3Cl-215.xml
similarity index 100%
rename from spectroscopy/cat/CH3Cl-215.xml
rename to spectroscopy/Artscat/CH3Cl-215.xml
diff --git a/spectroscopy/cat/CH3Cl-217.xml b/spectroscopy/Artscat/CH3Cl-217.xml
similarity index 100%
rename from spectroscopy/cat/CH3Cl-217.xml
rename to spectroscopy/Artscat/CH3Cl-217.xml
diff --git a/spectroscopy/cat/CH3OH-2161.xml b/spectroscopy/Artscat/CH3OH-2161.xml
similarity index 100%
rename from spectroscopy/cat/CH3OH-2161.xml
rename to spectroscopy/Artscat/CH3OH-2161.xml
diff --git a/spectroscopy/cat/CH4-211.xml b/spectroscopy/Artscat/CH4-211.xml
similarity index 100%
rename from spectroscopy/cat/CH4-211.xml
rename to spectroscopy/Artscat/CH4-211.xml
diff --git a/spectroscopy/cat/CH4-212.xml b/spectroscopy/Artscat/CH4-212.xml
similarity index 100%
rename from spectroscopy/cat/CH4-212.xml
rename to spectroscopy/Artscat/CH4-212.xml
diff --git a/spectroscopy/cat/CH4-311.xml b/spectroscopy/Artscat/CH4-311.xml
similarity index 100%
rename from spectroscopy/cat/CH4-311.xml
rename to spectroscopy/Artscat/CH4-311.xml
diff --git a/spectroscopy/cat/CH4-312.xml b/spectroscopy/Artscat/CH4-312.xml
similarity index 100%
rename from spectroscopy/cat/CH4-312.xml
rename to spectroscopy/Artscat/CH4-312.xml
diff --git a/spectroscopy/cat/CO-26.xml b/spectroscopy/Artscat/CO-26.xml
similarity index 100%
rename from spectroscopy/cat/CO-26.xml
rename to spectroscopy/Artscat/CO-26.xml
diff --git a/spectroscopy/cat/CO-27.xml b/spectroscopy/Artscat/CO-27.xml
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rename from spectroscopy/cat/CO-27.xml
rename to spectroscopy/Artscat/CO-27.xml
diff --git a/spectroscopy/cat/CO-28.xml b/spectroscopy/Artscat/CO-28.xml
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rename from spectroscopy/cat/CO-28.xml
rename to spectroscopy/Artscat/CO-28.xml
diff --git a/spectroscopy/cat/CO-36.xml b/spectroscopy/Artscat/CO-36.xml
similarity index 100%
rename from spectroscopy/cat/CO-36.xml
rename to spectroscopy/Artscat/CO-36.xml
diff --git a/spectroscopy/cat/CO-37.xml b/spectroscopy/Artscat/CO-37.xml
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rename from spectroscopy/cat/CO-37.xml
rename to spectroscopy/Artscat/CO-37.xml
diff --git a/spectroscopy/cat/CO-38.xml b/spectroscopy/Artscat/CO-38.xml
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rename from spectroscopy/cat/CO-38.xml
rename to spectroscopy/Artscat/CO-38.xml
diff --git a/spectroscopy/cat/CO2-626.xml b/spectroscopy/Artscat/CO2-626.xml
similarity index 100%
rename from spectroscopy/cat/CO2-626.xml
rename to spectroscopy/Artscat/CO2-626.xml
diff --git a/spectroscopy/cat/CO2-627.xml b/spectroscopy/Artscat/CO2-627.xml
similarity index 100%
rename from spectroscopy/cat/CO2-627.xml
rename to spectroscopy/Artscat/CO2-627.xml
diff --git a/spectroscopy/cat/CO2-628.xml b/spectroscopy/Artscat/CO2-628.xml
similarity index 100%
rename from spectroscopy/cat/CO2-628.xml
rename to spectroscopy/Artscat/CO2-628.xml
diff --git a/spectroscopy/cat/CO2-636.xml b/spectroscopy/Artscat/CO2-636.xml
similarity index 100%
rename from spectroscopy/cat/CO2-636.xml
rename to spectroscopy/Artscat/CO2-636.xml
diff --git a/spectroscopy/cat/CO2-637.xml b/spectroscopy/Artscat/CO2-637.xml
similarity index 100%
rename from spectroscopy/cat/CO2-637.xml
rename to spectroscopy/Artscat/CO2-637.xml
diff --git a/spectroscopy/cat/CO2-638.xml b/spectroscopy/Artscat/CO2-638.xml
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rename from spectroscopy/cat/CO2-638.xml
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diff --git a/spectroscopy/cat/CO2-727.xml b/spectroscopy/Artscat/CO2-727.xml
similarity index 100%
rename from spectroscopy/cat/CO2-727.xml
rename to spectroscopy/Artscat/CO2-727.xml
diff --git a/spectroscopy/cat/CO2-728.xml b/spectroscopy/Artscat/CO2-728.xml
similarity index 100%
rename from spectroscopy/cat/CO2-728.xml
rename to spectroscopy/Artscat/CO2-728.xml
diff --git a/spectroscopy/cat/CO2-737.xml b/spectroscopy/Artscat/CO2-737.xml
similarity index 100%
rename from spectroscopy/cat/CO2-737.xml
rename to spectroscopy/Artscat/CO2-737.xml
diff --git a/spectroscopy/cat/CO2-828.xml b/spectroscopy/Artscat/CO2-828.xml
similarity index 100%
rename from spectroscopy/cat/CO2-828.xml
rename to spectroscopy/Artscat/CO2-828.xml
diff --git a/spectroscopy/cat/CO2-837.xml b/spectroscopy/Artscat/CO2-837.xml
similarity index 100%
rename from spectroscopy/cat/CO2-837.xml
rename to spectroscopy/Artscat/CO2-837.xml
diff --git a/spectroscopy/cat/CO2-838.xml b/spectroscopy/Artscat/CO2-838.xml
similarity index 100%
rename from spectroscopy/cat/CO2-838.xml
rename to spectroscopy/Artscat/CO2-838.xml
diff --git a/spectroscopy/cat/COF2-269.xml b/spectroscopy/Artscat/COF2-269.xml
similarity index 100%
rename from spectroscopy/cat/COF2-269.xml
rename to spectroscopy/Artscat/COF2-269.xml
diff --git a/spectroscopy/cat/COF2-369.xml b/spectroscopy/Artscat/COF2-369.xml
similarity index 100%
rename from spectroscopy/cat/COF2-369.xml
rename to spectroscopy/Artscat/COF2-369.xml
diff --git a/spectroscopy/cat/CS-22.xml b/spectroscopy/Artscat/CS-22.xml
similarity index 100%
rename from spectroscopy/cat/CS-22.xml
rename to spectroscopy/Artscat/CS-22.xml
diff --git a/spectroscopy/cat/CS-23.xml b/spectroscopy/Artscat/CS-23.xml
similarity index 100%
rename from spectroscopy/cat/CS-23.xml
rename to spectroscopy/Artscat/CS-23.xml
diff --git a/spectroscopy/cat/CS-24.xml b/spectroscopy/Artscat/CS-24.xml
similarity index 100%
rename from spectroscopy/cat/CS-24.xml
rename to spectroscopy/Artscat/CS-24.xml
diff --git a/spectroscopy/cat/CS-32.xml b/spectroscopy/Artscat/CS-32.xml
similarity index 100%
rename from spectroscopy/cat/CS-32.xml
rename to spectroscopy/Artscat/CS-32.xml
diff --git a/spectroscopy/cat/ChangeLog b/spectroscopy/Artscat/ChangeLog
similarity index 100%
rename from spectroscopy/cat/ChangeLog
rename to spectroscopy/Artscat/ChangeLog
diff --git a/spectroscopy/cat/ClO-56.xml b/spectroscopy/Artscat/ClO-56.xml
similarity index 100%
rename from spectroscopy/cat/ClO-56.xml
rename to spectroscopy/Artscat/ClO-56.xml
diff --git a/spectroscopy/cat/ClO-76.xml b/spectroscopy/Artscat/ClO-76.xml
similarity index 100%
rename from spectroscopy/cat/ClO-76.xml
rename to spectroscopy/Artscat/ClO-76.xml
diff --git a/spectroscopy/cat/H2-11.xml b/spectroscopy/Artscat/H2-11.xml
similarity index 100%
rename from spectroscopy/cat/H2-11.xml
rename to spectroscopy/Artscat/H2-11.xml
diff --git a/spectroscopy/cat/H2-12.xml b/spectroscopy/Artscat/H2-12.xml
similarity index 100%
rename from spectroscopy/cat/H2-12.xml
rename to spectroscopy/Artscat/H2-12.xml
diff --git a/spectroscopy/cat/H2CO-1126.xml b/spectroscopy/Artscat/H2CO-1126.xml
similarity index 100%
rename from spectroscopy/cat/H2CO-1126.xml
rename to spectroscopy/Artscat/H2CO-1126.xml
diff --git a/spectroscopy/cat/H2CO-1128.xml b/spectroscopy/Artscat/H2CO-1128.xml
similarity index 100%
rename from spectroscopy/cat/H2CO-1128.xml
rename to spectroscopy/Artscat/H2CO-1128.xml
diff --git a/spectroscopy/cat/H2CO-1136.xml b/spectroscopy/Artscat/H2CO-1136.xml
similarity index 100%
rename from spectroscopy/cat/H2CO-1136.xml
rename to spectroscopy/Artscat/H2CO-1136.xml
diff --git a/spectroscopy/cat/H2O-161.xml b/spectroscopy/Artscat/H2O-161.xml
similarity index 100%
rename from spectroscopy/cat/H2O-161.xml
rename to spectroscopy/Artscat/H2O-161.xml
diff --git a/spectroscopy/cat/H2O-162.xml b/spectroscopy/Artscat/H2O-162.xml
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rename from spectroscopy/cat/H2O-162.xml
rename to spectroscopy/Artscat/H2O-162.xml
diff --git a/spectroscopy/cat/H2O-171.xml b/spectroscopy/Artscat/H2O-171.xml
similarity index 100%
rename from spectroscopy/cat/H2O-171.xml
rename to spectroscopy/Artscat/H2O-171.xml
diff --git a/spectroscopy/cat/H2O-172.xml b/spectroscopy/Artscat/H2O-172.xml
similarity index 100%
rename from spectroscopy/cat/H2O-172.xml
rename to spectroscopy/Artscat/H2O-172.xml
diff --git a/spectroscopy/cat/H2O-181.xml b/spectroscopy/Artscat/H2O-181.xml
similarity index 100%
rename from spectroscopy/cat/H2O-181.xml
rename to spectroscopy/Artscat/H2O-181.xml
diff --git a/spectroscopy/cat/H2O-182.xml b/spectroscopy/Artscat/H2O-182.xml
similarity index 100%
rename from spectroscopy/cat/H2O-182.xml
rename to spectroscopy/Artscat/H2O-182.xml
diff --git a/spectroscopy/cat/H2O-262.xml b/spectroscopy/Artscat/H2O-262.xml
similarity index 100%
rename from spectroscopy/cat/H2O-262.xml
rename to spectroscopy/Artscat/H2O-262.xml
diff --git a/spectroscopy/cat/H2O2-1661.xml b/spectroscopy/Artscat/H2O2-1661.xml
similarity index 100%
rename from spectroscopy/cat/H2O2-1661.xml
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diff --git a/spectroscopy/cat/H2S-121.xml b/spectroscopy/Artscat/H2S-121.xml
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rename from spectroscopy/cat/H2S-121.xml
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diff --git a/spectroscopy/cat/H2S-131.xml b/spectroscopy/Artscat/H2S-131.xml
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rename from spectroscopy/cat/H2S-131.xml
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diff --git a/spectroscopy/cat/H2S-141.xml b/spectroscopy/Artscat/H2S-141.xml
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rename from spectroscopy/cat/H2S-141.xml
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diff --git a/spectroscopy/cat/HBr-11.xml b/spectroscopy/Artscat/HBr-11.xml
similarity index 100%
rename from spectroscopy/cat/HBr-11.xml
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diff --git a/spectroscopy/cat/HBr-19.xml b/spectroscopy/Artscat/HBr-19.xml
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rename from spectroscopy/cat/HBr-19.xml
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diff --git a/spectroscopy/cat/HBr-21.xml b/spectroscopy/Artscat/HBr-21.xml
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rename from spectroscopy/cat/HBr-21.xml
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diff --git a/spectroscopy/cat/HBr-29.xml b/spectroscopy/Artscat/HBr-29.xml
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rename from spectroscopy/cat/HBr-29.xml
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diff --git a/spectroscopy/cat/HC3N-12224.xml b/spectroscopy/Artscat/HC3N-12224.xml
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rename from spectroscopy/cat/HC3N-12224.xml
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diff --git a/spectroscopy/cat/HCN-124.xml b/spectroscopy/Artscat/HCN-124.xml
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rename from spectroscopy/cat/HCN-124.xml
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diff --git a/spectroscopy/cat/HCN-125.xml b/spectroscopy/Artscat/HCN-125.xml
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rename from spectroscopy/cat/HCN-125.xml
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diff --git a/spectroscopy/cat/HCN-134.xml b/spectroscopy/Artscat/HCN-134.xml
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rename from spectroscopy/cat/HCN-134.xml
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diff --git a/spectroscopy/cat/HCOOH-1261.xml b/spectroscopy/Artscat/HCOOH-1261.xml
similarity index 100%
rename from spectroscopy/cat/HCOOH-1261.xml
rename to spectroscopy/Artscat/HCOOH-1261.xml
diff --git a/spectroscopy/cat/HCl-15.xml b/spectroscopy/Artscat/HCl-15.xml
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rename from spectroscopy/cat/HCl-15.xml
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diff --git a/spectroscopy/cat/HCl-17.xml b/spectroscopy/Artscat/HCl-17.xml
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rename from spectroscopy/cat/HCl-17.xml
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diff --git a/spectroscopy/cat/HCl-25.xml b/spectroscopy/Artscat/HCl-25.xml
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rename from spectroscopy/cat/HCl-25.xml
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diff --git a/spectroscopy/cat/HCl-27.xml b/spectroscopy/Artscat/HCl-27.xml
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rename from spectroscopy/cat/HCl-27.xml
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diff --git a/spectroscopy/cat/HF-19.xml b/spectroscopy/Artscat/HF-19.xml
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rename from spectroscopy/cat/HF-19.xml
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diff --git a/spectroscopy/cat/HF-29.xml b/spectroscopy/Artscat/HF-29.xml
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diff --git a/spectroscopy/cat/HI-17.xml b/spectroscopy/Artscat/HI-17.xml
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diff --git a/spectroscopy/cat/HI-27.xml b/spectroscopy/Artscat/HI-27.xml
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rename from spectroscopy/cat/HI-27.xml
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diff --git a/spectroscopy/cat/HNO3-146.xml b/spectroscopy/Artscat/HNO3-146.xml
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diff --git a/spectroscopy/cat/HNO3-156.xml b/spectroscopy/Artscat/HNO3-156.xml
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rename from spectroscopy/cat/HNO3-156.xml
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diff --git a/spectroscopy/cat/HO2-166.xml b/spectroscopy/Artscat/HO2-166.xml
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diff --git a/spectroscopy/cat/HOBr-161.xml b/spectroscopy/Artscat/HOBr-161.xml
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rename from spectroscopy/cat/HOBr-161.xml
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diff --git a/spectroscopy/cat/HOBr-169.xml b/spectroscopy/Artscat/HOBr-169.xml
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diff --git a/spectroscopy/cat/HOCl-165.xml b/spectroscopy/Artscat/HOCl-165.xml
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diff --git a/spectroscopy/cat/HOCl-167.xml b/spectroscopy/Artscat/HOCl-167.xml
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rename from spectroscopy/cat/HOCl-167.xml
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diff --git a/spectroscopy/cat/N2-44.xml b/spectroscopy/Artscat/N2-44.xml
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diff --git a/spectroscopy/cat/N2-45.xml b/spectroscopy/Artscat/N2-45.xml
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diff --git a/spectroscopy/cat/N2O-446.xml b/spectroscopy/Artscat/N2O-446.xml
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diff --git a/spectroscopy/cat/N2O-448.xml b/spectroscopy/Artscat/N2O-448.xml
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diff --git a/spectroscopy/cat/N2O-456.xml b/spectroscopy/Artscat/N2O-456.xml
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diff --git a/spectroscopy/cat/N2O-546.xml b/spectroscopy/Artscat/N2O-546.xml
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diff --git a/spectroscopy/cat/NH3-4111.xml b/spectroscopy/Artscat/NH3-4111.xml
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diff --git a/spectroscopy/cat/NH3-5111.xml b/spectroscopy/Artscat/NH3-5111.xml
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diff --git a/spectroscopy/cat/NO+-46.xml b/spectroscopy/Artscat/NO+-46.xml
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diff --git a/spectroscopy/cat/NO-48.xml b/spectroscopy/Artscat/NO-48.xml
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diff --git a/spectroscopy/cat/NO-56.xml b/spectroscopy/Artscat/NO-56.xml
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diff --git a/spectroscopy/cat/NO2-646.xml b/spectroscopy/Artscat/NO2-646.xml
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diff --git a/spectroscopy/cat/O-6.xml b/spectroscopy/Artscat/O-6.xml
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diff --git a/spectroscopy/cat/O2-66.xml b/spectroscopy/Artscat/O2-66.xml
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diff --git a/spectroscopy/cat/O2-67.xml b/spectroscopy/Artscat/O2-67.xml
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diff --git a/spectroscopy/cat/O2-68.xml b/spectroscopy/Artscat/O2-68.xml
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diff --git a/spectroscopy/cat/O3-666.xml b/spectroscopy/Artscat/O3-666.xml
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diff --git a/spectroscopy/cat/OCS-622.xml b/spectroscopy/Artscat/OCS-622.xml
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diff --git a/spectroscopy/cat/OH-61.xml b/spectroscopy/Artscat/OH-61.xml
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diff --git a/spectroscopy/cat/PH3-1111.xml b/spectroscopy/Artscat/PH3-1111.xml
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