diff --git a/.gitignore b/.gitignore
index 22671b4..6752854 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,5 +9,6 @@
 /termmapper
 /cmd/termmapper/termmapper
 *.yaml
+!/mappings/*.yaml
 \#*
 !/cmd/termmapper/
\ No newline at end of file
diff --git a/README.md b/README.md
index 8a9d0df..b81ee81 100644
--- a/README.md
+++ b/README.md
@@ -170,9 +170,11 @@
 
 The SDK script and server data-attribute in the HTML are determined by the configuration file's `sdk` and `server` values, with fallback to default endpoints if not specified.
 
-### GET /health
+## Supported mappings
 
-Health check endpoint that returns "OK" with HTTP 200 status.
+### `mappings/stts-upos.yaml`
+
+Mapping between STTS and UD part-of-spech tags.
 
 ## Progress
 
diff --git a/mappings/stts-upos.yaml b/mappings/stts-upos.yaml
new file mode 100644
index 0000000..3a6abee
--- /dev/null
+++ b/mappings/stts-upos.yaml
@@ -0,0 +1,62 @@
+id: stts-upos
+desc: Mapping from STTS and Universal dependency Part-of-Speech
+foundryA: opennlp
+layerA: p
+foundryB: upos
+layerB: p
+mappings:
+  - "[$\\(] <> [PUNCT & PunctType=Brck]"
+  - "[$,] <> [PUNCT & PunctType=Comm]"
+  - "[$.] <> [PUNCT & PunctType=Peri]"
+  - "[ADJA] <> [ADJ]"
+  - "[ADJD] <> [ADJ & Variant=Short]"
+  - "[ADV] <> [ADV]"
+  - "[APPO] <> [ADP & AdpType=Post]"
+  - "[APPR] <> [ADP & AdpType=Prep]"
+  - "[APPRART] <> [ADP & AdpType=Prep & PronType=Art]"
+  - "[APZR] <> [ADP & AdpType=Circ]"
+  - "[ART] <> [DET & PronType=Art]"
+  - "[CARD] <> [NUM & NumType=Card]"
+  - "[FM] <> [X & Foreign=Yes]"
+  - "[ITJ] <> [INTJ]"
+  - "[KOKOM] <> [CCONJ & ConjType=Comp]"
+  - "[KON] <> [CCONJ]"
+  - "[KOUI] <> [SCONJ]"
+  - "[KOUS] <> [SCONJ]"
+  - "[NE] <> [PROPN]"
+  - "[NN] <> [NOUN]"
+  - "[PAV] <> [ADV & PronType=Dem]"
+  - "[PDAT] <> [DET & PronType=Dem]"
+  - "[PDS] <> [PRON & PronType=Dem]"
+  - "[PIAT] <> [DET & (PronType=Ind | PronType=Neg | PronType=Tot)]"
+  - "[PIDAT] <> [DET & AdjType=Pdt & (PronType=Ind | PronType=Neg | PronType=Tot)]"
+  - "[PIS] <> [PRON & (PronType=Ind | PronType=Neg | PronType=Tot)]"
+  - "[PPER] <> [PRON & PronType=Prs]"
+  - "[PPOSAT] <> [DET	& Poss=Yes & PronType=Prs]"
+  - "[PPOSS] <> [PRON	& Poss=Yes & PronType=Prs]"
+  - "[PRELAT] <> [DET & PronType=Rel]"
+  - "[PRELS] <> [PRON	& PronType=Rel]"
+  - "[PRF] <> [PRON & PronType=Prs & Reflex=Yes]"
+  - "[PTKA] <> [PART]"
+  - "[PTKANT] <> [PART & PartType=Res]"
+  - "[PTKNEG] <> [PART & Polarity=Neg]"
+  - "[PTKVZ] <> [ADP & PartType=Vbp]"
+  - "[PTKZU] <> [PART	& PartType=Inf]"
+  - "[PWAT] <> [DET & PronType=Int]"
+  - "[PWAV] <> [ADV & PronType=Int]"
+  - "[PWS] <> [PRON & PronType=Int]"
+  - "[TRUNC] <> [X & Hyph=Yes]"
+  - "[VAFIN] <> [AUX & Mood=Ind & VerbForm=Fin]"
+  - "[VAIMP] <> [AUX & Mood=Imp & VerbForm=Fin]"
+  - "[VAINF] <> [AUX & VerbForm=Inf]"
+  - "[VAPP] <> [AUX & Aspect=Perf & VerbForm=Part]"
+  - "[VMFIN] <> [VERB	& Mood=Ind & VerbForm=Fin & VerbType=Mod]"
+  - "[VMINF] <> [VERB	& VerbForm=Inf & VerbType=Mod]"
+  - "[VMPP] <> [VERB & Aspect=Perf & VerbForm=Part & VerbType=Mod]"
+  - "[VVFIN] <> [VERB	& Mood=Ind & VerbForm=Fin]"
+  - "[VVIMP] <> [VERB	& Mood=Imp & VerbForm=Fin]"
+  - "[VVINF] <> [VERB & VerbForm=Inf]"
+  - "[VVIZU] <> [VERB	& VerbForm=Inf]"
+  - "[VVPP] <> [VERB & Aspect=Perf & VerbForm=Part]"
+  - "[XY] <> [X]"
+