diff --git a/alib2data/src/alphabet/SymbolFeatures.h b/alib2data/src/alphabet/SymbolFeatures.h
index 4f7ff75b0d6f545f9b344dd3d8f139e2586e5546..7774d2545f3e4a5f3e6a5cd32bda8875a55951c1 100644
--- a/alib2data/src/alphabet/SymbolFeatures.h
+++ b/alib2data/src/alphabet/SymbolFeatures.h
@@ -13,19 +13,6 @@
 
 namespace alphabet {
 
-enum class FEATURES {
-	LABELED,
-	BLANK,
-	BOTTOM,
-	END,
-	RANKED,
-	BAR,
-	VARIABLES_BAR,
-	SUBTREE_WILDCARD,
-	UNIQUE_SYMBOL,
-	START
-};
-
 class Symbol;
 class SymbolBase;
 
diff --git a/alib2data/src/automaton/AutomatonFeatures.h b/alib2data/src/automaton/AutomatonFeatures.h
index 0d55baca2869732f402bb5fc5222ea9dca087942..45eedc29f83b3c86c5ebf73b0b18324e5701c23d 100644
--- a/alib2data/src/automaton/AutomatonFeatures.h
+++ b/alib2data/src/automaton/AutomatonFeatures.h
@@ -15,29 +15,6 @@
 
 namespace automaton {
 
-enum class FEATURES {
-	MULTI_INITIAL_STATE_EPSILON_NFA,
-	EPSILON_NFA,
-	MULTI_INITIAL_STATE_NFA,
-	NFA,
-	DFA,
-	COMPACT_NFA,
-	EXTENDED_NFA,
-	DPDA,
-	SINGLE_POP_DPDA,
-	INPUT_DRIVEN_DPDA,
-	INPUT_DRIVEN_NPDA,
-	VISIBLY_PUSHDOWN_DPDA,
-	VISIBLY_PUSHDOWN_NPDA,
-	REAL_TIME_HEIGHT_DETERMINISTIC_DPDA,
-	REAL_TIME_HEIGHT_DETERMINISTIC_NPDA,
-	NPDA,
-	SINGLE_POP_NPDA,
-	ONE_TAPE_DTM,
-	DFTA,
-	NFTA
-};
-
 class Automaton;
 class AutomatonBase;
 enum class Shift;
diff --git a/alib2data/src/grammar/GrammarFeatures.h b/alib2data/src/grammar/GrammarFeatures.h
index 68c094c4487e7310da48f42755baaa8c1625517a..49e94fa390745ff234900dc444c5139e485da37f 100644
--- a/alib2data/src/grammar/GrammarFeatures.h
+++ b/alib2data/src/grammar/GrammarFeatures.h
@@ -12,22 +12,6 @@
 
 namespace grammar {
 
-enum class FEATURES {
-	LEFT_LG,
-	LEFT_RG,
-	RIGHT_LG,
-	RIGHT_RG,
-	LG,
-	CFG,
-	EPSILON_FREE_CFG,
-	CNF,
-	GNF,
-	CSG,
-	NON_CONTRACTING_GRAMMAR,
-	CONTEXT_PRESERVING_UNRESTRICTED_GRAMMAR,
-	UNRESTRICTED_GRAMMAR
-};
-
 class Grammar;
 class GrammarBase;
 
diff --git a/alib2data/src/label/LabelFeatures.h b/alib2data/src/label/LabelFeatures.h
index fbabb06f3a9cd0118aca0d1f51cace65cc2f6c96..ed4327bde79f0558c02e88186faae707a35b924b 100644
--- a/alib2data/src/label/LabelFeatures.h
+++ b/alib2data/src/label/LabelFeatures.h
@@ -10,14 +10,6 @@
 
 namespace label {
 
-enum class FEATURES {
-	PRIMITIVE,
-	UNIQUE_LABEL,
-	INITIAL_STATE,
-	FAIL_STATE,
-	FINAL_STATE
-};
-
 class Label;
 class LabelBase;
 
diff --git a/alib2data/src/regexp/RegExpFeatures.h b/alib2data/src/regexp/RegExpFeatures.h
index 4aea3ea6dfaaa81c8d99667704205f4674eca5bf..2cf6fc27dc0a209c326a446cbc572c4a45bfab87 100644
--- a/alib2data/src/regexp/RegExpFeatures.h
+++ b/alib2data/src/regexp/RegExpFeatures.h
@@ -12,11 +12,6 @@
 
 namespace regexp {
 
-enum class FEATURES {
-	FORMAL,
-	UNBOUNDED
-};
-
 class RegExp;
 class RegExpBase;
 
diff --git a/alib2data/src/rte/RTEFeatures.h b/alib2data/src/rte/RTEFeatures.h
index b46411d173a56d0283d3c91bb92f0426dcda4d33..404a9f2a9395bd925648e64617faf5a92608f996 100644
--- a/alib2data/src/rte/RTEFeatures.h
+++ b/alib2data/src/rte/RTEFeatures.h
@@ -14,10 +14,6 @@
 
 namespace rte {
 
-enum class FEATURES {
-	FORMAL
-};
-
 class RTE;
 class RTEBase;
 
diff --git a/alib2data/src/string/StringFeatures.h b/alib2data/src/string/StringFeatures.h
index 90887f534b802e2994b3077851849ea3ae8cb317..a0dd06fc26d1a451e22d9ea04aa8729dec0db919 100644
--- a/alib2data/src/string/StringFeatures.h
+++ b/alib2data/src/string/StringFeatures.h
@@ -12,13 +12,6 @@
 
 namespace string {
 
-enum class FEATURES {
-	LINEAR,
-	WILDCARD_LINEAR,
-	CYCLIC,
-	EPSILON
-};
-
 class String;
 class StringBase;
 
diff --git a/alib2data/src/tree/TreeFeatures.h b/alib2data/src/tree/TreeFeatures.h
index 728068e4de8a94ebff3acb6af0db863ac8e51151..28cbc533ea7900236acdcbc6a024697cd26b92a8 100644
--- a/alib2data/src/tree/TreeFeatures.h
+++ b/alib2data/src/tree/TreeFeatures.h
@@ -13,22 +13,6 @@
 
 namespace tree {
 
-enum class FEATURES {
-	RANKED_TREE,
-	RANKED_PATTERN,
-	RANKED_NONLINEAR_PATTERN,
-	PREFIX_RANKED_TREE,
-	PREFIX_RANKED_BAR_TREE,
-	PREFIX_RANKED_PATTERN,
-	PREFIX_RANKED_BAR_PATTERN,
-	PREFIX_RANKED_NONLINEAR_PATTERN,
-	PREFIX_RANKED_BAR_NONLINEAR_PATTERN,
-	POSTFIX_RANKED_TREE,
-	UNRANKED_TREE,
-	UNRANKED_PATTERN,
-	UNRANKED_NONLINEAR_PATTERN
-};
-
 class Tree;
 class TreeBase;