diff --git a/include/basetype.h b/include/basetype.h
index 1ccbade..e63c406 100644
--- a/include/basetype.h
+++ b/include/basetype.h
@@ -61,5 +61,10 @@ typedef struct libab_basetype_s libab_basetype;
  */
 void libab_basetype_init(libab_basetype* basetype, int n, 
         const libab_basetype_param params[]);
+/**
+ * Frees the given basetype.
+ * @param basetype the type to free.
+ */
+void libab_basetype_free(libab_basetype* basetype);
 
 #endif
diff --git a/include/libabacus.h b/include/libabacus.h
index da9124d..f9f8f59 100644
--- a/include/libabacus.h
+++ b/include/libabacus.h
@@ -78,9 +78,17 @@ libab_result libab_register_operator_postfix(libab* ab, const char* op, const ch
  * @param name the name of the function.
  * @param type the type of this operator.
  * @param func the function that describes the functionality of the function.
- * @return the result of the initialization.
+ * @return the result of the registration.
  */
 libab_result libab_register_function(libab* ab, const char* name, const char* type, libab_function_ptr func);
+/**
+ * Registers a base type with abacus.
+ * @param ab the libabacus instance used to keep state.
+ * @param name the name to register the basetype under.
+ * @param basetype the basetype to register.
+ * @return the result of the registration.
+ */
+libab_result libab_register_basetype(libab* ab, const char* name, libab_basetype* basetype);
 /**
  * Releases all the resources allocated by libabacus.
  * @param ab the libabacus instance to release.
diff --git a/include/table.h b/include/table.h
index 0b9edad..6592af0 100644
--- a/include/table.h
+++ b/include/table.h
@@ -4,6 +4,7 @@
 #include "result.h"
 #include "custom.h"
 #include "trie.h"
+#include "basetype.h"
 
 /**
  * A struct that represents a structure
@@ -29,7 +30,7 @@ struct libab_table_s {
  */
 enum libab_table_entry_variant_e {
     ENTRY_VALUE,
-    ENTRY_TYPE,
+    ENTRY_BASETYPE,
     ENTRY_OP,
     ENTRY_FUN
 };
@@ -49,6 +50,7 @@ struct libab_table_entry_s {
     union {
         libab_operator op;
         libab_function function;
+        libab_basetype* basetype;
     } data_u;
 };
 
@@ -95,6 +97,14 @@ libab_operator* libab_table_search_operator(libab_table* table, const char* stri
  * @return the found function, or NULL if it was not found.
  */
 libab_function* libab_table_search_function(libab_table* table, const char* string);
+/**
+ * Searches for the given basetype in the table, returning a value
+ * only if it's a basetype.
+ * @param table the table to search.
+ * @param string the string to search for.
+ * @return the found basetype, or NULL if it was not found.
+ */
+libab_basetype* libab_table_search_basetype(libab_table* table, const char* string);
 /**
  * Stores the given entry in the table under the given key.
  * @param table the table to store the entry into.
diff --git a/src/basetype.c b/src/basetype.c
index 2b121a1..6f64c5c 100644
--- a/src/basetype.c
+++ b/src/basetype.c
@@ -7,4 +7,6 @@ void libab_basetype_init(libab_basetype* basetype,
     basetype->params = params;
     basetype->count = n;
 }
+void libab_basetype_free(libab_basetype* basetype) {
 
+}
diff --git a/src/libabacus.c b/src/libabacus.c
index a857d92..b437944 100644
--- a/src/libabacus.c
+++ b/src/libabacus.c
@@ -126,6 +126,25 @@ libab_result libab_register_function(libab* ab, const char* name, const char* ty
     return result;
 }
 
+libab_result libab_register_basetype(libab* ab, const char* name, libab_basetype* basetype) {
+    libab_result result = LIBAB_SUCCESS;
+    libab_table_entry* new_entry;
+    if((new_entry = malloc(sizeof(*new_entry)))) {
+        new_entry->variant = ENTRY_BASETYPE;
+        new_entry->data_u.basetype = basetype;
+    }
+
+    if(result == LIBAB_SUCCESS) {
+        result = libab_table_put(&ab->table, name, new_entry);
+    }
+
+    if(result != LIBAB_SUCCESS) {
+        free(new_entry);
+    }
+
+    return result;
+}
+
 libab_result libab_free(libab* ab) {
     libab_table_free(&ab->table);
     libab_parser_free(&ab->parser);
diff --git a/src/table.c b/src/table.c
index bb88261..86ce5a0 100644
--- a/src/table.c
+++ b/src/table.c
@@ -55,6 +55,18 @@ libab_function* libab_table_search_function(libab_table* table, const char* stri
     libab_table_entry* entry = libab_table_search_filter(table, string, NULL, _table_compare_function);
     return entry ? &entry->data_u.function : NULL;
 }
+
+int _table_compare_basetype(const void* left, const void* right) {
+    const libab_table_entry* entry = right;
+    return entry->variant == ENTRY_BASETYPE;
+}
+
+libab_basetype* libab_table_search_basetype(libab_table* table, const char* string) {
+    libab_table_entry* entry = libab_table_search_filter(table, string, NULL, _table_compare_basetype);
+    return entry ? entry->data_u.basetype : NULL;
+}
+
+
 libab_result libab_table_put(libab_table* table, const char* string, libab_table_entry* entry) {
     return libab_trie_put(&table->trie, string, entry);
 }
@@ -72,5 +84,7 @@ void libab_table_entry_free(libab_table_entry* entry) {
         libab_operator_free(&entry->data_u.op);
     } else if(entry->variant == ENTRY_FUN) {
         libab_function_free(&entry->data_u.function);
+    } else if(entry->variant == ENTRY_BASETYPE) {
+        libab_basetype_free(entry->data_u.basetype);
     }
 }