📄 rfc1563.ps
字号:
2064(if)X2155(the)X2305(formatting)X2744(command)X3156("<bold>")X3545(appears)X3871(at)X3973(some)X720 2368(point,)N974(there)X1199(must)X1418(later)X1622(be)X1745(a)X1820("</bold>")X2236(to)X2343(balance)X2670(it.)X2803(\(NOTE:)X3173(The)X3354(60)X3481(character)X3866(limit)X4080(on)X720 2480(formatting)N1166(commands)X1622(does)X1837(NOT)X2073(include)X2396(the)X2553("<",)X2748(">",)X2943(or)X3062("/")X3206(characters)X3636(that)X3820(might)X4085(be)X720 2592(attached)N1066(to)X1165(such)X1365(commands.\))X720 2816(Formatting)N1198(commands)X1665(are)X1833(always)X2150(case-insensitive.)X2858(That)X3085(is,)X3223("bold")X3522(and)X3711("BoLd")X4058(are)X720 2928(equivalent)N1146(in)X1245(effect,)X1513(if)X1596(not)X1743(in)X1842(good)X2058(taste.)X720 3152(Beyond)N1055(tokens)X1342(delimited)X1743(by)X1875("<")X2043(and)X2218(">",)X2411(there)X2641(are)X2796(two)X2977(other)X3212(special)X3517(processing)X3965(rules.)X720 3264(First,)N972(a)X1067(literal)X1345(less-than)X1739(sign)X1951(\("<"\))X2199(can)X2385(be)X2528(represented)X3024(by)X3172(a)X3267(sequence)X3672(of)X3804(two)X4000(such)X720 3376(characters,)N1167("<<".)X1457(Second,)X1796(line)X1974(breaks)X2258(\(CRLF)X2563(pairs)X2783(in)X2891(standard)X3250(network)X3598(representation\))X720 3488(are)N882(handled)X1231(specially.)X1666(In)X1790(particular,)X2228(isolated)X2572(CRLF)X2856(pairs)X3087(are)X3249(translated)X3667(into)X3860(a)X3946(single)X720 3600(SPACE)N1045(character.)X1474(Sequences)X1907(of)X2014(N)X2110(consecutive)X2592(CRLF)X2859(pairs,)X3097(however,)X3479(are)X3624(translated)X4026(into)X720 3712(N-1)N906(actual)X1174(line)X1356(breaks.)X1692(This)X1900(permits)X2226(long)X2434(lines)X2653(of)X2770(data)X2968(to)X3079(be)X3206(represented)X3686(in)X3797(a)X3876(natural-)X720 3824(looking)N1068(manner)X1411(despite)X1738(the)X1910(frequency)X2349(of)X2483(line-wrapping)X3077(in)X3206(Internet)X3560(mailers.)X3946(When)X720 3936(preparing)N1127(the)X1283(data)X1482(for)X1632(mail)X1842(transport,)X2246(isolated)X2584(line)X2767(breaks)X3055(should)X3348(be)X3476(inserted)X3818(wherever)X720 4048(necessary)N1127(to)X1235(keep)X1450(each)X1661(line)X1840(shorter)X2141(than)X2341(80)X2471(characters.)X2992(When)X3256(preparing)X3659(such)X3869(data)X4064(for)X720 4160(presentation)N1235(to)X1354(the)X1516(user,)X1744(isolated)X2088(line)X2277(breaks)X2572(should)X2872(be)X3007(replaced)X3378(by)X3518(a)X3605(single)X3878(SPACE)X720 4272(character,)N1136(and)X1314(N)X1422(consecutive)X1916(CRLF)X2195(pairs)X2421(should)X2716(be)X2846(presented)X3254(to)X3368(the)X3525(user)X3724(as)X3843(N-1)X4031(line)X720 4384(breaks.)N720 4608(Thus)N936(text/enriched)X1464(data)X1649(that)X1818(looks)X2050(like)X2219(this:)X720 6160(Borenstein)N3853([Page)X4096(2])X3 p%%Page: 3 312 s 12 xH 0 xS 1 f720 400(RFC)N925(1563)X1844(A)X1937(text/enriched)X2465(type)X2655(for)X2791(MIME)X3661(January)X3984(1994)X7 f1008 688(This)N1298(is)X1008 800(a)N1124(single)X1008 912(line)N1008 1136(This)N1298(is)X1472(the)X1008 1248(next)N1298(line.)X1008 1584(This)N1298(is)X1472(the)X1008 1696(next)N1298 0.4167(paragraph.)AX1 f720 1920(should)N1000(be)X1115(displayed)X1508(by)X1628(a)X1695(text/enriched)X2223(interpreter)X2649(as)X2753(follows:)X7 f1008 2144(This)N1298(is)X1472(a)X1588(single)X1994(line)X1008 2256(This)N1298(is)X1472(the)X1704(next)X1994(line.)X1008 2480(This)N1298(is)X1472(the)X1704(next)X1994 0.4167(paragraph.)AX1 f720 2704(The)N896(formatting)X1329(commands,)X1796(not)X1945(all)X2068(of)X2174(which)X2436(will)X2613(be)X2731(implemented)X3262(by)X3385(all)X3509(implementations,)X720 2816(are)N862(described)X1255(in)X1354(the)X1496(following)X1894(sections.)X3 f16 s720 3072(Form)N1026(atting)X1379(Com)X1642(m)X1749(ands)X1 f12 s720 3328(The)N905(text/enriched)X1444(formatting)X1886(commands)X2338(all)X2470(begin)X2719(with)X2925(<commandname>)X3657(and)X3831(end)X4005(with)X720 3440(</commandname>,)N1525(affecting)X1901(the)X2052(formatting)X2492(of)X2604(the)X2754(text)X2931(between)X3284(those)X3519(two)X3695(tokens.)X4026(The)X720 3552(commands)N1161(are)X1303(described)X1696(here,)X1910(grouped)X2249(according)X2653(to)X2752(type.)X3 f14 s720 3792(Font-Alteration)N1503(Commands)X1 f12 s720 4032(The)N917(following)X1338(formatting)X1792(commands)X2256(are)X2421(intended)X2801(to)X2924(alter)X3144(the)X3310(font)X3513(in)X3636(which)X3919(text)X4112(is)X720 4144(displayed,)N1137(but)X1284(not)X1431(to)X1530(alter)X1726(the)X1868(indentation)X2326(or)X2430(justi\256cation)X2909(state)X3110(of)X3214(the)X3356(text:)X3 f1008 4368(Bold)N1 f1226(--)X1316(causes)X1593(the)X1737(affected)X2074(text)X2245(to)X2346(be)X2463(in)X2564(a)X2633(bold)X2830(font.)X3059(Nested)X3352(bold)X3550(commands)X3994(have)X1296 4480(the)N1438(same)X1660(effect)X1904(as)X2008(a)X2075(single)X2329(bold)X2524(command.)X3 f1008 4592(Italic)N1 f1254(--)X1350(causes)X1633(the)X1783(affected)X2127(text)X2305(to)X2413(be)X2537(in)X2645(an)X2769(italic)X2996(font.)X3232(Nested)X3532(italic)X3759(commands)X1296 4704(have)N1502(the)X1644(same)X1866(effect)X2110(as)X2214(a)X2281(single)X2535(italic)X2753(command.)X3 f1008 4816(Fixed)N1 f1287(--)X1400(causes)X1700(the)X1867(affected)X2227(text)X2421(to)X2545(be)X2685(in)X2810(a)X2903(\256xed)X3145(width)X3414(font.)X3667(Nested)X3984(\256xed)X1296 4928(commands)N1737(have)X1943(the)X2085(same)X2307(effect)X2551(as)X2655(a)X2722(single)X2976(\256xed)X3192(command.)X3 f1008 5040(Smaller)N1 f1353(--)X1441(causes)X1717(the)X1860(affected)X2196(text)X2366(to)X2466(be)X2582(in)X2682(a)X2750(smaller)X3059(font.)X3287(It)X3371(is)X3460(recommended)X4031(that)X1296 5152(the)N1449(font)X1639(size)X1823(be)X1948(changed)X2303(by)X2433(two)X2611(points,)X2904(but)X3061(other)X3293(amounts)X3653(may)X3853(be)X3978(more)X1296 5264(appropriate)N1779(in)X1898(some)X2146(environments.)X2763(Nested)X3075(smaller)X3404(commands)X3866(produce)X1296 5376(ever-smaller)N1834(fonts,)X2106(to)X2237(the)X2411(limits)X2686(of)X2821(the)X2994(implementation's)X3724(capacity)X4101(to)X1296 5488(reasonably)N1748(display)X2061(them,)X2313(after)X2525(which)X2795(further)X3092(smaller)X3411(commands)X3863(have)X4080(no)X1296 5600(incremental)N1776(effect.)X720 6160(Borenstein)N3853([Page)X4096(3])X4 p%%Page: 4 412 s 12 xH 0 xS 1 f3 f1 f720 400(RFC)N925(1563)X1844(A)X1937(text/enriched)X2465(type)X2655(for)X2791(MIME)X3661(January)X3984(1994)X3 f1008 688(Bigger)N1 f1311(--)X1405(causes)X1686(the)X1834(affected)X2175(text)X2350(to)X2456(be)X2578(in)X2684(a)X2758(bigger)X3035(font.)X3269(It)X3359(is)X3454(recommended)X4031(that)X1296 800(the)N1449(font)X1639(size)X1823(be)X1948(changed)X2303(by)X2433(two)X2611(points,)X2904(but)X3061(other)X3293(amounts)X3653(may)X3853(be)X3978(more)X1296 912(appropriate)N1785(in)X1910(some)X2163(environments.)X2785(Nested)X3102(bigger)X3398(commands)X3866(produce)X1296 1024(ever-bigger)N1800(fonts,)X2076(to)X2211(the)X2389(limits)X2669(of)X2809(the)X2986(implementation's)X3720(capacity)X4101(to)X1296 1136(reasonably)N1752(display)X2069(them,)X2325(after)X2541(which)X2815(further)X3116(bigger)X3401(commands)X3858(have)X4080(no)X1296 1248(incremental)N1776(effect.)X3 f1008 1360(Underline)N1 f1480(--)X1605(causes)X1917(the)X2096(affected)X2468(text)X2674(to)X2810(be)X2962(underlined.)X3483(Nested)X3812(underline)X1296 1472(commands)N1737(have)X1943(the)X2085(same)X2307(effect)X2551(as)X2655(a)X2722(single)X2976(underline)X3364(command.)X720 1696(While)N1029(the)X1220("bigger")X1617(and)X1829("smaller")X2264(operators)X2695(are)X2887(effectively)X3374(inverses,)X3787(it)X3915(is)X4053(not)X720 1808(recommended,)N1326(for)X1474(example,)X1861(that)X2042("<smaller>")X2548(be)X2675(used)X2911(to)X3022(end)X3197(the)X3350(effect)X3605(of)X3720("<bigger>".)X720 1920(This)N915(is)X1003(properly)X1353(done)X1564(with)X1759("</bigger>".)X3 f14 s720 2160(Fill/Justi\256cation)N1526(Commands)X1 f12 s720 2400(Initially,)N1100(text/enriched)X1654(text)X1849(is)X1963(intended)X2345(to)X2471(be)X2613(displayed)X3033(fully)X3266(\256lled)X3515(with)X3737(appropriate)X720 2512(kerning)N1046(and)X1217 0.2321(letter-tracking)AX1796(as)X1908(suits)X2116(the)X2266(capabilities)X2738(of)X2850(the)X3000(receiving)X3390(user)X3581(agent)X3821(software.)X720 2624(Actual)N1007(line)X1182(width)X1431(is)X1525(left)X1684(to)X1789(the)X1937(discretion)X2347(of)X2457(the)X2605(receiver,)X2970(which)X3235(is)X3329(expected)X3702(to)X3808(fold)X3994(lines)X720 2736(intelligently)N1211(\(preferring)X1652(soft)X1820(line)X1989(breaks\))X2296(to)X2395(the)X2537(best)X2716(of)X2820(its)X2935(ability.)X720 2960(The)N907(following)X1318(commands)X1772(alter)X1981(that)X2163(state.)X2425(Each)X2655(of)X2772(these)X3007(commands)X3462(force)X3698(a)X3779(line)X3962(break)X720 3072(before)N1001(and)X1175(after)X1387(the)X1540(formatting)X1982(environment)X2504(if)X2598(there)X2826(is)X2925(not)X3083(otherwise)X3491(a)X3568(line)X3747(break.)X4043(For)X720 3184(example,)N1095(if)X1178(one)X1341(of)X1446(these)X1669(commands)X2111(occurs)X2387(anywhere)X2786(other)X3009(than)X3200(the)X3343(beginning)X3753(of)X3858(a)X3926(line)X4096(of)X720 3296(text)N889(as)X993(presented,)X1410(a)X1477(new)X1661(line)X1830(is)X1918(begun.)X3 f1008 3520(Center)N1 f1315(--)X1403(causes)X1678(the)X1820(affected)X2155(text)X2324(to)X2423(be)X2538(centered.)X3 f1008 3632(FlushLeft)N1 f1456(--)X1568(causes)X1867(the)X2033(affected)X2393(text)X2587(to)X2711(be)X2851(left-justi\256ed)X3371(with)X3591(a)X3683(ragged)X3994(right)X1296 3744(margin.)N3 f1008 3856(FlushRight)N1 f1509(--)X1616(causes)X1911(the)X2073(affected)X2428(text)X2617(to)X2736(be)X2871(right-justi\256ed)X3439(with)X3654(a)X3741(ragged)X4047(left)X1296 3968(margin.)N3 f1008 4080(FlushBoth)N1 f1476(--)X1583(causes)X1877(the)X2038(affected)X2392(text)X2580(to)X2698(be)X2832(\256lled)X3073(and)X3255(padded)X3576(so)X3704(as)X3827(to)X3945(create)X1296 4192(smooth)N1603(left)X1756(and)X1919(right)X2125(margins,)X2483(i.e.,)X2649(to)X2748(be)X2863(fully)X3069(justi\256ed.)X3 f1008 4304(No\256ll)N1 f1256(--)X1344(causes)X1619(the)X1761(affected)X2096(text)X2265(to)X2364(be)X2479(displayed)X2872(without)X3190(\256lling)X3444(or)X3548(justi\256cation.)X720 4528(The)N909(center,)X1208(\257ushleft,)X1586(\257ushright,)X2017(and)X2195(\257ushboth)X2591(commands)X3047(are)X3204(mutually)X3586(exclusive,)X4013(and,)X720 4640(when)N952(nested,)X1246(the)X1388(inner)X1610(command)X2014(takes)X2236(precedence.)X720 4864(Whether)N1089(or)X1206(not)X1366(text)X1548(is)X1649(justi\256ed)X1996(by)X2130(default)X2436(\(that)X2651(is,)X2777(whether)X3125(the)X3281(default)X3587(environment)X
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -