Add also xhtml1 dtd to local catalog
diff --git a/lib/dtds/xhtml/dtd/xhtml1.dcl b/lib/dtds/xhtml/dtd/xhtml1.dcl
new file mode 100644
index 0000000..912fd06
--- /dev/null
+++ b/lib/dtds/xhtml/dtd/xhtml1.dcl
@@ -0,0 +1,192 @@
+<!SGML "ISO 8879:1986 (WWW)"
+
+     -- SGML Declaration for XML 1.0 --
+
+     -- from: 
+        Final text of revised Web SGML Adaptations Annex (TC2) to ISO 8879:1986
+        ISO/IEC JTC1/SC34 N0029: 1998-12-06
+        Annex L.2 (informative): SGML Declaration for XML
+
+        changes made to accommodate validation are noted with 'VALID:'
+     --
+
+     CHARSET
+         BASESET
+             "ISO Registration Number 177//CHARSET
+              ISO/IEC 10646-1:1993 UCS-4 with implementation
+              level 3//ESC 2/5 2/15 4/6"
+         DESCSET
+                 0        9  UNUSED
+                 9        2       9
+                11        2  UNUSED
+                13        1      13
+                14       18  UNUSED
+                32       95      32
+               127        1  UNUSED
+               128       32  UNUSED
+               160    55136     160
+             55296     2048  UNUSED  -- surrogates --
+             57344     8190   57344
+             65534        2  UNUSED  -- FFFE and FFFF --
+             65536  1048576   65536
+
+     CAPACITY NONE  -- Capacities are not restricted in XML --
+
+     SCOPE DOCUMENT
+
+     SYNTAX
+         SHUNCHAR NONE
+         BASESET "ISO Registration Number 177//CHARSET
+                  ISO/IEC 10646-1:1993 UCS-4 with implementation
+                  level 3//ESC 2/5 2/15 4/6"
+         DESCSET
+             0 1114112 0
+         FUNCTION
+             RE    13
+             RS    10
+             SPACE 32
+             TAB   SEPCHAR 9
+         NAMING
+             LCNMSTRT ""
+             UCNMSTRT ""
+             NAMESTRT
+                 58 95 192-214 216-246 248-305 308-318 321-328
+                 330-382 384-451 461-496 500-501 506-535 592-680
+                 699-705 902 904-906 908 910-929 931-974 976-982
+                 986 988 990 992 994-1011 1025-1036 1038-1103
+                 1105-1116 1118-1153 1168-1220 1223-1224
+                 1227-1228 1232-1259 1262-1269 1272-1273
+                 1329-1366 1369 1377-1414 1488-1514 1520-1522
+                 1569-1594 1601-1610 1649-1719 1722-1726
+                 1728-1742 1744-1747 1749 1765-1766 2309-2361
+                 2365 2392-2401 2437-2444 2447-2448 2451-2472
+                 2474-2480 2482 2486-2489 2524-2525 2527-2529
+                 2544-2545 2565-2570 2575-2576 2579-2600
+                 2602-2608 2610-2611 2613-2614 2616-2617
+                 2649-2652 2654 2674-2676 2693-2699 2701
+                 2703-2705 2707-2728 2730-2736 2738-2739
+                 2741-2745 2749 2784 2821-2828 2831-2832
+                 2835-2856 2858-2864 2866-2867 2870-2873 2877
+                 2908-2909 2911-2913 2949-2954 2958-2960
+                 2962-2965 2969-2970 2972 2974-2975 2979-2980
+                 2984-2986 2990-2997 2999-3001 3077-3084
+                 3086-3088 3090-3112 3114-3123 3125-3129
+                 3168-3169 3205-3212 3214-3216 3218-3240
+                 3242-3251 3253-3257 3294 3296-3297 3333-3340
+                 3342-3344 3346-3368 3370-3385 3424-3425
+                 3585-3630 3632 3634-3635 3648-3653 3713-3714
+                 3716 3719-3720 3722 3725 3732-3735 3737-3743
+                 3745-3747 3749 3751 3754-3755 3757-3758 3760
+                 3762-3763 3773 3776-3780 3904-3911 3913-3945
+                 4256-4293 4304-4342 4352 4354-4355 4357-4359
+                 4361 4363-4364 4366-4370 4412 4414 4416 4428
+                 4430 4432 4436-4437 4441 4447-4449 4451 4453
+                 4455 4457 4461-4462 4466-4467 4469 4510 4520
+                 4523 4526-4527 4535-4536 4538 4540-4546 4587
+                 4592 4601 7680-7835 7840-7929 7936-7957
+                 7960-7965 7968-8005 8008-8013 8016-8023 8025
+                 8027 8029 8031-8061 8064-8116 8118-8124 8126
+                 8130-8132 8134-8140 8144-8147 8150-8155
+                 8160-8172 8178-8180 8182-8188 8486 8490-8491
+                 8494 8576-8578 12295 12321-12329 12353-12436
+                 12449-12538 12549-12588 19968-40869 44032-55203
+
+             LCNMCHAR ""
+             UCNMCHAR ""
+             NAMECHAR
+                 45-46 183 720-721 768-837 864-865 903 1155-1158
+                 1425-1441 1443-1465 1467-1469 1471 1473-1474
+                 1476 1600 1611-1618 1632-1641 1648 1750-1764
+                 1767-1768 1770-1773 1776-1785 2305-2307 2364
+                 2366-2381 2385-2388 2402-2403 2406-2415
+                 2433-2435 2492 2494-2500 2503-2504 2507-2509
+                 2519 2530-2531 2534-2543 2562 2620 2622-2626
+                 2631-2632 2635-2637 2662-2673 2689-2691 2748
+                 2750-2757 2759-2761 2763-2765 2790-2799
+                 2817-2819 2876 2878-2883 2887-2888 2891-2893
+                 2902-2903 2918-2927 2946-2947 3006-3010
+                 3014-3016 3018-3021 3031 3047-3055 3073-3075
+                 3134-3140 3142-3144 3146-3149 3157-3158
+                 3174-3183 3202-3203 3262-3268 3270-3272
+                 3274-3277 3285-3286 3302-3311 3330-3331
+                 3390-3395 3398-3400 3402-3405 3415 3430-3439
+                 3633 3636-3642 3654-3662 3664-3673 3761
+                 3764-3769 3771-3772 3782 3784-3789 3792-3801
+                 3864-3865 3872-3881 3893 3895 3897 3902-3903
+                 3953-3972 3974-3979 3984-3989 3991 3993-4013
+                 4017-4023 4025 8400-8412 8417 12293 12330-12335
+                 12337-12341 12441-12442 12445-12446 12540-12542
+
+             NAMECASE
+                 GENERAL NO
+                 ENTITY  NO
+         DELIM
+             GENERAL  SGMLREF
+             HCRO     "&#38;#x"
+                      -- Ampersand followed by "#x" (without quotes) --
+             NESTC    "/"
+             NET      ">"
+             PIC      "?>"
+             SHORTREF NONE
+
+         NAMES
+             SGMLREF
+
+         QUANTITY
+             NONE -- Quantities are not restricted in XML --
+
+         ENTITIES
+             "amp"  38
+             "lt"   60
+             "gt"   62
+             "quot" 34
+             "apos" 39
+
+     FEATURES
+         MINIMIZE
+             DATATAG NO
+             OMITTAG NO
+             RANK    NO
+             SHORTTAG
+                 STARTTAG
+                     EMPTY    NO
+                     UNCLOSED NO
+                     NETENABL IMMEDNET
+                 ENDTAG
+                     EMPTY    NO
+                     UNCLOSED NO
+                 ATTRIB
+                     DEFAULT  YES
+                     OMITNAME NO
+                     VALUE    NO
+             EMPTYNRM  YES
+             IMPLYDEF
+                 ATTLIST  NO  -- VALID: was YES --
+                 DOCTYPE  NO
+                 ELEMENT  NO  -- VALID: was YES --
+                 ENTITY   NO
+                 NOTATION NO  -- VALID: was YES --
+         LINK
+             SIMPLE   NO
+             IMPLICIT NO
+             EXPLICIT NO
+         OTHER
+             CONCUR   NO
+             SUBDOC   NO
+             FORMAL   NO
+             URN      NO
+             KEEPRSRE YES
+             VALIDITY TYPE -- VALID: was NOASSERT --
+             ENTITIES
+                 REF      ANY
+                 INTEGRAL YES
+
+     APPINFO NONE
+
+     SEEALSO "ISO 8879//NOTATION Extensible Markup Language (XML) 1.0//EN"
+>
+<!-- Id: $Id$ SMI
+     Revisions:
+#1999-04-09  changes for XML validation
+#2001-04-08  updated ISO registration number for UCS-4
+-->