<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'sourceforge.net',cType: 'managed',cRay: '95e09a07c61c5076',cH: 'yCLkPrFkAMf7yywp7BJTYea4n9QddAJugIdrUKmZsOA-1752323948-1.2.1.1-1JYpcaFC.Eg706HTagRUmHloCO.rLuU6OjsNKpKWC6QAOhbPrf0aeKXM4E_GI0Qz',cUPMDTk:"\/p\/xsb\/src\/3583\/tree\/\/trunk\/XSB\/docs\/userman\/manual2.tex?__cf_chl_tk=LpMorUQvNUHv1u4ZGytmpdyO4aB00C5riXjsXS0LbkU-1752323948-1.0.1.1-wo4s4QtWoAyYk0jt92Iq_m.5UCUs47OMVC5t4DFymAk",cFPWv: 'g',cITimeS: '1752323948',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/p\/xsb\/src\/3583\/tree\/\/trunk\/XSB\/docs\/userman\/manual2.tex?__cf_chl_f_tk=LpMorUQvNUHv1u4ZGytmpdyO4aB00C5riXjsXS0LbkU-1752323948-1.0.1.1-wo4s4QtWoAyYk0jt92Iq_m.5UCUs47OMVC5t4DFymAk",md: 'dzNlrM7fRCgM7MOGp4rbklWE6.AbsUgOp7nFeunl_mw-1752323948-1.2.1.1-sQ3oxwtqo3ho.Lt7k4K2mJREzv5Q4sfoy5X6EASUbunQNs828Xm8fFCIGZ2vZqbMadBPDZo63Nq3YwUDpSeuJLP5g1pQ6Ig9GBm8pfW42b2xfFOjZ.jVNqG0ddnMbk57IJH6O_It0.X1W.BJGcWQRDeahwxms0gRUhA52ugGZqL8X30ZaOFbjpUw2jUt4H79BR4pV2GrVMjFiIQIN2owGVDW4ZLfZmpjJG6ME2kqNm8N3BE5pmtL9bc7U36LKf7Sa_RcYPK1ZAkGU2176QBiMGf4Frlzj4EvJrwRPBwMGYNYt_a2lcWUEdITdvmbN4wHdm1.z6Bx9cVOSYo5mHBI7Kj4LK52e1Vb336TN4H_U.IjYzRxPQ34N2hFxQoSCot.0IBcViLB67eC8B7SxkykeM5jJ6CdhF8E2LkZ_KTHGYI76DkhIm0TxN0inp3uPP4.B.naqyTKlsfCtr36QepHWSwGEhCwScRy45BS4V11AH_2YIgLjTv0zfdLA9_rKeU8.eV59FVIL3M8rGq1mZlQKNjp.9EEl8..0jKwS_fOeO4VktUzjE4qbxcRxljjjMVMOgRXVjsP9ttI_bqwRp_6XZMmjw81xa07UNqcmRxh2WF2fHC_leASpVaUOlrOVpTieAYoTcnkCIUGujHs85CDWZEBIJCJIMR_nRmyaakB4SgDJr5XyVx24wsE132tBv6daB.VvGhLnV6I6KgZ8m5_SJaOWFuOn_Ytl33Gbz_uoDVcWxSzkZM9Nd2BKb6VY2vH5sU7iremEgf58MaaMiDVQfKY3T_t2QOFcqRf8XlP9eTuKvdyEbMn8Nk01RJyoG7ag.aFeH6GR4Dqc_b1fsIqwzmBcBvHBC2_.AdUNzsJ7MK7djGu93tJOOGQDNeCTfXQvgVKLDlSsW88gnelYaL.W7Yaq52J_lW2bAEDlJQX0_AG5KVnvH51wNRPvjPJ83tQuckKllax9DH4oB6YnzW0SAla48SnmI2qM4DmyOWGFa0',mdrd: 'KB_aHEjJFcKJJZVcaLNSIeRBSULNmz43GRlxSo4mQrs-1752323948-1.2.1.1-LBzbCCnp96B6p.e.2F.age8EOw7bp8pyjkHIc7OScpy7X7hhzyurp3DujtjaNA6Y5Z6KXBHYwtCRK2UUBZJGHK8RWujvFDMXcXPXaCc_SA9daCWh_bbK6R.qxbWC_jctbN.npZTCf4nTOWhOJxJ943GGRjGGPGtF97yHxFBecG6mQxrdvGoptVr88nG0DMJN2CItebRipMQWSTGpOTfnbQqK4VsB4LtWLqbVE_2uOeSFfHw1bBWMygulhpmOvp.E2RreibxELUnwpCgzexEhzS7tf7TSRhf8FWstGucs.SdKAtCvN4d11EFk2MU_NS2XRPTiyOLbKf9dW69L.YaXgS_FvfgqhXGTc_CK7384WGxPB_.s_zRR1GWplbqfBHuV_qxPDacRWgqbSsUxo8HVWPFcIBQ483bbcPOnb5_it8H59ATGVo3TYUkHJKX8BB0aA5YSDOiLnl6bLaY.vfsygn4FDMM1AUkUqOFktR7n1JUSvWF_B3fAgSVd0EN7_RhVd3lkOii0glsF3Kq4gZJzl2C_jJs6B6oZcgpbEPtPNLwc0tgOPVwlBpCcBXoIBhpi_NbVMwz1TwyxW1DguEdrej1rUEzxZxT5xhq5m4rDTkyrosN88H1v8c.I8_eeSXX0wRofLLeO9KhUk5rMERnTiuBjVYbdoExTLOJ8jnfwpoUQ7C_J.tTfuwnDybMwSfxkb1f43dEIMVuamHkbjrEjMmRdnwDGqldxrH3lzX25zXsYkOZ3_DH_XlDNQ0EHNQrDp8O94hkiK98rpRo8DiO4SvOAdSFExHW5kvAgV5ytxD.hqd_fmV.Ks4kkK7L7NPeIP3P1lcFTwTmXsGTa2yjiLbNOGNgXIEWKVZPlEmnIQUNu0vHIXgf.uestDtrh80ieXjcMpFoHX974qc1OHFkULfQz0g.h1m_ENdHngaCZUlGFv.wDA9PENgAVhp73PbAkEDQi5kXPQ.B4gddjBR8Lwj7Y5YdTXGM6aUljnAY_DS_IMGzs3KGVr_8k.SFmMLYsZtOj7g2nU9OgiB0_260AfGevPO5KZyNGVdlgvSI2SC_VubaZ5VTRm4Oy1_clC_vJDJfky2psVKGcGrokBDSFNNE10itlnGXjvJ_sA75QxzkqLPE4YNPVIWpJmlfiNhdKGHf8SP6mFJx5nm67k5alyDEr1mSTY85XHZlUxtNYFT_zvsQMc3uRxuJqbssLOE6_sOelpwl.E1R8pBgkaN4yqjFOjs8v0XMJDdOw.E9bxgdtQtffiqg6Z865cab50FYHuHKzI_lSa6AGH1XYXg5XAdGGQaj3d2OE7S4UJssj5izyzm7j_LZLtqUY2g1bMFFYg_3iQeYEG_Ff0fj.I_cRJp1EH8qXXaxDaftpZBn1eMVVSUiyOzNbuAKYTa.1Bdr4MPo9SA313zso3vkZVr1IVGsYLYAyNTxYiCiYsGRbEvOEGemlo7O73AD_p1AkEjqqicf8BULfGHDYr5xdPuovIgdSnAM.JmlZFCskBnZbycio75S91geDhPcDOAwZ._Q3Efl4mGy1sBcMz0UxxptiVgqRels1Nk0UtmTG5Ur4tenVPloYgrM45yMhnQkLuMOoRqTIVBkhU8u36K_uPi8VUXs1qg.x8DLkw1ax212ztsELXvqnZH1qElYTM.ffDxSCjHHftiyCYHRVeoSl1STzQZYVd9BwbBQRPnAP2sujcwXjZMvd8L8mTfFv9NJxrplN2lOdbbt7CO3deYZnRlOxHi6twZ7x0Gq.0TzAf2ivWgyf4cDLfeeaR1pNhnlrnVQp1PvkFifJ0QcckZ73yqlC7YKiHGLneiq2.zY69A82aRRLdi4z52mrEhgFZoNrLfcV5vCCvx9Yp5y5XC94APs8HLelJdUz41aGdFYetEsCmo_sIWnKrDTzUNRrUwdG6nrxiZAnC7iyRHPHBvvOZqjtXC98ParpxbqmdKXrthyXlx3atJ57CCJG9_brWVV4Bt6yvUmxPGkHouPkRsm1zgqn8zY3kjYTB2IQhy7azEQ9ZhjuqEvI0CzablaasR3daPwISAObGi4qjGLDcIHtbj8SbkuRYR5tgmiRYYI5iJYFcdUFOmaRjkuVZ68HxFsnV42AhCg4mvIhk9v5er12bh0pVx_eBBjxEmKQ5gq5efx9oBVg29XIAOh2psCtBNQ7g9XJD1Q7FgaaWPVejdBJvJ.eGkWG5BST.HaEM9V_qoyL3wxaoCTOdmT18cMOptPXJ6daGYiYuOExeqgr3roHA4IroWlcGlI4q4RIKgkv8xN.KmGvyGk2ywwFF7YeI0d8QTmi15omW5RcAnEe.lrUHNHKHZIFRpXqm0bqGd3qVjtUtq6dLYzG.IcU4LPA8pYJL7aP.L0hltVu44e9AXmn2jT8roFs4F317oMpj3B3Z8GpLjW4BlgWmMzV6gwuiKY0qcaLS00BbGUDligGBtnZYMbwFPkD2PT8nTFUKqxcWDcZFahH9lsTdF2nf_5.jrwVlqDK3n5pii.0Xi4QfYsLyhViaigiI1tSJUygYn6Vo6i7bc_wB.2TvMJXxp7wLG8d8AFZ9pmu71Y8N8OE996161EqwLYugvytn8YATcGIDJKGUhN_GWdrJT_b09kfcmmUwsF47QfmAD0nbUd3E4xlliC1iA',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=95e09a07c61c5076';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null,"\/p\/xsb\/src\/3583\/tree\/\/trunk\/XSB\/docs\/userman\/manual2.tex?__cf_chl_rt_tk=LpMorUQvNUHv1u4ZGytmpdyO4aB00C5riXjsXS0LbkU-1752323948-1.0.1.1-wo4s4QtWoAyYk0jt92Iq_m.5UCUs47OMVC5t4DFymAk"+ window._cf_chl_opt.cOgUHash);a.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(a);}());</script></body></html>