((p "Evaluation blocks are used to enter text that could be evaluated by either Zettelstore or external software." " " "They begin with at least three tilde characters (" (@L (@H "&ldquo;") (kbd "~") (@H "&rdquo;")) ", U+007E) at the first position of a line.") (p "You can add some " (a (@ (href . "00001007050000")) "attributes") " on the beginning line of a verbatim block, following the initiating characters." " " "The evaluation block supports the default attribute" (sup (@ (id . "fnref:1")) (a (@ (class . "zs-noteref") (href . "#fn:1") (role . "doc-noteref")) "1")) ": when given, all spaces in the text are rendered in HTML as open box characters (U+2423)." " " "If you want to give only one attribute and this attribute is the generic attribute, you can omit the most of the attribute syntax and just specify the value." " " "It will be interpreted as a " (a (@ (href . "00001008000000")) "syntax") " value to evaluate its content." " " "Not all syntax values are supported by Zettelstore." (sup (@ (id . "fnref:2")) (a (@ (class . "zs-noteref") (href . "#fn:2") (role . "doc-noteref")) "2")) " " "The main reason for an evaluation block is to be used with external software via the " (a (@ (href . "00001012920516")) "sz encoding") ".") (p "Any other character in this line will be ignored") (p "Text following the beginning line will not be interpreted, until a line begins with at least the same number of the same characters given at the beginning line." " " "This allows to enter some tilde characters in the text that should not be interpreted.") (p "For example:") (pre (code (@ (class . "language-zmk")) "~~~~\n~~~\n~~~~")) (p "will be rendered in HTML as:") (div (@ (class . "example")) (pre (code (@ (class . "zs-eval")) "~~~"))) (pre (code (@ (class . "language-zmk")) "~~~{-}\nThis is  some\ntext with no \n  real sense.\n~~~~")) (p "will be rendered as:") (div (@ (class . "example")) (pre (code (@ (class . "zs-eval")) "This is  some\ntext with no \n  real sense."))) (pre (code (@ (class . "language-zmk")) "~~~draw\n+---+     +---+\n| A | --> | B |\n+---+     +---+\n~~~")) (p "will be rendered as:") (div (@ (class . "example")) (p (@H "<svg class=\"zs-draw\" width=\"160\" height=\"80\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><marker id=\"Pointer\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerUnits=\"strokeWidth\" markerWidth=\"5\" markerHeight=\"10\" orient=\"auto\"><path d=\"M 0 0 L 10 5 L 0 10 z\" /></marker><g id=\"closed\" stroke=\"#000\" stroke-width=\"2\" fill=\"none\"><path id=\"closed0\" d=\"M 5 10 L 15 10 L 25 10 L 35 10 L 45 10 L 45 30 L 45 50 L 35 50 L 25 50 L 15 50 L 5 50 L 5 30 Z\" /><path id=\"closed1\" d=\"M 105 10 L 115 10 L 125 10 L 135 10 L 145 10 L 145 30 L 145 50 L 135 50 L 125 50 L 115 50 L 105 50 L 105 30 Z\" /></g><g id=\"lines\" stroke=\"#000\" stroke-width=\"2\" fill=\"none\"><path id=\"open2\" marker-end=\"url(#Pointer)\" d=\"M 65 30 L 75 30 L 85 30 \" /></g><g id=\"text\" stroke=\"none\" style=\"font-family:monospace;font-size:15px\"><text id=\"obj3\" x=\"22.5\" y=\"35\">A</text><text id=\"obj4\" x=\"122.5\" y=\"35\">B</text></g></svg>"))))