diff --git a/skeletons/NumericString.c b/skeletons/NumericString.c
new file mode 100644
index 0000000..a007496
--- /dev/null
+++ b/skeletons/NumericString.c
@@ -0,0 +1,62 @@
+/*-
+ * Copyright (c) 2003 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#include <NumericString.h>
+
+/*
+ * NumericString basic type description.
+ */
+static ber_tlv_tag_t asn1_DEF_NumericString_tags[] = {
+	(ASN_TAG_CLASS_UNIVERSAL | (18 << 2))
+};
+asn1_TYPE_descriptor_t asn1_DEF_NumericString = {
+	"NumericString",
+	NumericString_constraint,
+	OCTET_STRING_decode_ber,    /* Implemented in terms of OCTET STRING */
+	OCTET_STRING_encode_der,    /* Implemented in terms of OCTET STRING */
+	OCTET_STRING_print_ascii,   /* ASCII subset */
+	OCTET_STRING_free,
+	0, /* Use generic outmost tag fetcher */
+	asn1_DEF_NumericString_tags,
+	sizeof(asn1_DEF_NumericString_tags)
+	  / sizeof(asn1_DEF_NumericString_tags[0]),
+	1,	/* Single UNIVERSAL tag may be implicitly overriden */
+	-1,	/* Both ways are fine */
+};
+
+int
+NumericString_constraint(asn1_TYPE_descriptor_t *td, const void *sptr,
+		asn_app_consume_bytes_f *app_errlog, void *app_key) {
+	const NumericString_t *st = sptr;
+
+	if(st && st->buf) {
+		uint8_t *buf = st->buf;
+		uint8_t *end = buf + st->size;
+
+		/*
+		 * Check the alphabet of the NumericString.
+		 * ASN.1:1984 (X.409)
+		 */
+		for(; buf < end; buf++) {
+			switch(*buf) {
+			case 0x20:
+			case 0x30: case 0x31: case 0x32: case 0x33: case 0x34:
+			case 0x35: case 0x36: case 0x37: case 0x38: case 0x39:
+				continue;
+			}
+			_ASN_ERRLOG("%s: value byte %d "
+				"not in NumericString alphabet (%d)",
+				td->name,
+				(buf - st->buf) + 1,
+				*buf
+			);
+			return -1;
+		}
+	} else {
+		_ASN_ERRLOG("%s: value not given", td->name);
+		return -1;
+	}
+
+	return 0;
+}