<!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: '95d2842ce208ab21',cH: 'Uu8cod.ti3fO2hCU9SoLw7faxd9wV.bxnuBhkkDRCcg-1752176252-1.2.1.1-AOyxQDCJZCnBiI3Zt4AypjjRSstaa.EiJqTQIGmOMfYys.zrAMU2iuHx8Ikchg9E',cUPMDTk:"\/p\/xsb\/src\/3978\/tree\/\/trunk\/XSB\/docs\/userman\/manual2.tex?__cf_chl_tk=rYwuJ5Bpmdf8gnS5V.zvvVA6XjCYgdiAtcGsBBrE4Nc-1752176252-1.0.1.1-Ue_Gtcw_bTHactKvcgQksUSTljYN5FDY1Zh2C.SyOuw",cFPWv: 'b',cITimeS: '1752176252',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/p\/xsb\/src\/3978\/tree\/\/trunk\/XSB\/docs\/userman\/manual2.tex?__cf_chl_f_tk=rYwuJ5Bpmdf8gnS5V.zvvVA6XjCYgdiAtcGsBBrE4Nc-1752176252-1.0.1.1-Ue_Gtcw_bTHactKvcgQksUSTljYN5FDY1Zh2C.SyOuw",md: 'edrnsk8_6._8D8s63FbwkjVQVYuOy9oUczEgbckqHO8-1752176252-1.2.1.1-oS6da6zSR.zbl9E4L87cUe108s8h4QidR3z90u8RFfU7xFdSkoYVwOa0LXE0dzNa4G33YUy.E5jgU8lb7TLl.9a8NgjennNawLqIcnlYiNu8P0LfBCQ8eLgZlGWfM8Dl1cBaSbOfnFYR1Ysnq4Nls7ka85lg5hoGW8hYExt9mKJgnPugxYbKdShBFN7dEo9r8ecMdneYgHLvNkSlFBjb9gTVsaZLwau2VDBTaoPvaVSkshp22JGNTQ05_6hTAapeoHqh19mNvjLu6.FopNKudpRd7K_8suKy1dND2zBpl0ZepQwumfl4lqF109cjksY.ExNPGKdVq_jQ89Vixhh0akGRaRdEyxsDNZK87aWYcBKrQO4kg7PX07CulRY2H7N92i.I9KrPqLujnKOa2mLyhUn4FSMUvKqQk5FPtVFabaAFhSdJK.Vq_nEBsXNfTUSmIROCv.aEt66QVGcUz7jppKT_3N5o6Mk4M3.UzXGZZ2pjvKKlx8T5CzVZ0VvtVwZ.DtG1y7UHL4vRenbV5cubDryLBXWcUFvRFWcpLCQIo_t5z6ftXmbxXtoS0y0vgfJfM1_WB2GL8WhmCLk_m19puRjg7DX54iTnkXt8xy53mgHSrhdx.ZrvpzW3xMhGivwQ1XaBWCcXvJtYi_9T3IOQGeoKW.WqNTzEBezk4j3hBpQLCpTkUYBfCcXkVAhxOnV6C01nYop_Yp9bKaLOx2CY3TGjOHZOKqd1bw6914OdXn4O7JfxC9.EbWh2hTjcjKuvFa1mpMzB6wv6iXMcN0irQzuvNB79HfK5Ildy37.lGUCuqI2IviarCvGcd8wJRFoACjD10IppeRvZ.cl_z90wo3SKiBrPivZwHGGbPRNKBrwt6S0_OUyq72.5LWXqnT5WA4lheq9KdmRwi3n4bSGsvLCK4yzBCG9__cimQcE70IkZYINjA.UdnG.oH8w1LG3qexKb1gF0WStfaoYLLAS0ZySOCyk9OkW106zRt9SNBaM',mdrd: 'b5i.FUWBg.ZA0rB2GWjJGEqpZoCC6pP04g6p0lTqD_s-1752176252-1.2.1.1-OPxmIsai4S_qs3mfy2zKNSHlLJmYsslyXl8Vug_2MLJCjTkpcXHAmAnUwPGB7KgZ7Ib5TGbofEP2SuHz3VY5t0WwJRz0FdwfJUePYd1e8ZTumq9GLPMP4vM7FAi4fwcuE4SxYTXXK3GTwCsaKw6U8VkoEqrazKjkulKQ9UaTj7b64MUlElwjvZnqrjxUh7.qb8g.AU0ikFhnYNnUc5utLsDPSocPffuB9McU2bv_n158mXnFFOWVv15qC.T.VtJXncEJrRspcoAoHOV8fl1yBqoOg653L1KcV3VP_564UqUrnDIHKOha76dgaBR1Siq.njkGHwmDT1V1MStubhQXHXHGhwG_EPyloeiJLkXxZ.xpXYOanUwpigRIUboQSGC1_.Q4R0VxZtEszQa7Cq6DngdSB7.7R67nAXw2_m.z9fJreCZ.UhGCCSppsQkuwr1wNmfajdOtZz1dNJ6lVppobnhtOuiYmXAetNxciB.GGk8CgM1zvFjJHpa8wU2Q3eKaJkp.Vip4UakKIW2dqu.LcN4pIyCcpDLh.VvEbu6d_GDXSKkkwklJzfpmVWS9iQfDD7nawyYw8RN5dzVRoUQEt3DDye0c0XBMc2HceBjWz5IuvGpX5tS7lUWO.gbahDWBNkeWbb002Fdo8Ik7tsAeJ88O4ZCmm5E.xXdYFgn2ixITnPwE9UdDr4WhlIhFf3LQEOwAcqSawRWGX61IaIksnvNsxPOqF8._EoGwMFtKzHnG0ujcvccr_c0tn_64FfilmsV24DY5He86kR.j2qXOfy_meLzd0BCGTZwgkj51QEdnx.6EbSALjJfepRQYERz3jiE07e4vNhYU6_BdqXMCeOs6SoAXzzpF4lKAMIKjp.i3cl3CqvW56qFGbFKmtS3Pur2tsvZGwyIR9gfh_VP7qq7QWx2m14w7x4KQEe0NvbgDsIws7dj5G8K.lFf8Y5LNPXvXh5zJHyxWPxDI2UJDZQSYkQbnbOAeKZKkR3DW416x8g.WZp52YyCKptmwyoRBKwBNgQZmF7kryUr1p3d2hMqluI1IL9NIR7pxhOiRorkXmywFmiePE8eIN89CO49pTXNcBKSeKlJtDcDvnX9sLFH7T3Sp4_ARJcx3_Ofwwd0iQfO1_TjKLAqNiGxVWvmdpb3MubDoI115hhakMnfT3XunBjEVxxxkzZ.F9cEe89u1tKYMijsG2Wa93WGJ_1MUIZDyFlWo4EivNJznWnPzMAQGB5_NVU1GHZMBqKPREorI6_5ocZ81XBMkuSE6RonHVYs9p5UYcOJd_s2jdlyKl3IFW2etktNCLz71o4cd80cps5i8ntSriNc_Tr8.GGrRrXd.j7eNSXwMdw2vP8uUBLSgbVLZobxYd_79G8NTsfkwVZdffcRvhIG6j1Pr3arL6pFlowOOc9jn10FvtkHqPYZq8.q3j4RRzLGIJd6T9OXljjBdZj9pefovYMR0ZnZS39QUSN_9PE6QFUa4L5GqxZe5gU6EMSktzZNVa8jggV1PWedYHmHtFqas0rBMRl8E7KkDuFYXEXWMBr.faCFoutdHD5ar7EiolT5D2io0k09V7dQ7NgOCQt8jzaehLYjI1tUUziMDMazCaghaWsGUYkFoIo9tx.VYaND1bgfhZJSmIKtSEj1t6hXRIQ8uudwvsKSfUa3bWmScASOXBWRENDKiXnUB5pW6p8TCrQGee2xSGKWA0cksqY7DoGNcYfbhTOjw24_i4BTT_kdZf2RCGyon0dOKEzrsW70KjwmtbPekvRfrul0VCC2nPEnj.tQd9k57KVsACJJQrEbJhwoZlPqm_B16TQ4bPI9YUO5Bgvic1w7aFoQouVSnCKZn4N5SNfc6p8mNVs3I..gA3grTiCZe89VW9p0bc8qCgqvFCWj4MujlB2aPbPC00sYLuVl0S__ayP98sA.BFVJsKfPpHCH25ByqY8BcthCw9gIVjiJntCcrYotL0c.mKMFG.LAIL5NjvQgccbhXEpdjYnNWhdxOd_xuEsasbf3r6Wu9gvue1cZd08QN3wAkX8bLXBIE5_3gEktWCtPiUdtNTtRdEsg1ZvhH1gA_up7hxNo1rYNAYxcIX8rwjTUT4BPPr6KHYDC66ClgDXK6wNOdFmbJQ9BJiheAXGnlJ35K49yibFMoNm_3Ki66ZGP1TFIV7m95STXFCwUbQSXi7fOGimISTjQISAcfuqpDHmwbf4CZnKJiOJits7zbLnbjoJfVYPlkuWKeqX0m7eRx_U0hYGaa9cRx4cRUr2LpO7mKasEBU6Emlcl8FqwBu_bBzlXj88r2nSUghL3MO8pq7S2p.zoVWZrOx7_6._wTJmHzK9PAm5PYYN5zBfgxWWmB_t3M5atyaoiVMWETeLTUSpAyQMbbycKQmXQdssoQZU88HAweeEuoru6zJd2PMYXJg168vfGvte.1hYUoTjU0opt9w29_y0BH9B.THrhJFw.EWl17a3tefV7h0UZ6rNTIAMH7p5tNrGZOwV4vG2IUOrMm.czXL4wxUQcluWSQ8SvltfPwqI1D56Qb8BXmiW5GgOX.6V8nrMaRQQdJ8jXblJr2XK36j_RdBSAJMe_SoOODkL4R2xTrIMJzzZRfHxYNYTJglhsyiAwPk4GkQ2kIowlCRg9iPw',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=95d2842ce208ab21';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\/3978\/tree\/\/trunk\/XSB\/docs\/userman\/manual2.tex?__cf_chl_rt_tk=rYwuJ5Bpmdf8gnS5V.zvvVA6XjCYgdiAtcGsBBrE4Nc-1752176252-1.0.1.1-Ue_Gtcw_bTHactKvcgQksUSTljYN5FDY1Zh2C.SyOuw"+ window._cf_chl_opt.cOgUHash);a.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(a);}());</script></body></html>