NXML

NXML 是一种标记语言，它不是 XML。它基于 XML，但走了非常不同的方向，现在与 XML 完全不同。

语法解释

• 节点可以是文本（hello）或序列（[I|am|a|sequence]）
• 括号（[ 和 ]）包围序列
• 节点可以一个接一个地出现，无需任何显式的分隔符（text[sequence][sequence]text）
• 竖线（|）表示文本节点的结束（否则文本节点在输入结束时或序列边界（括号）处结束）。这可以用来连续放置文本节点或创建一个空文本节点
• 每个特殊字符（|、[、] 或 \）都可以用反斜杠（\）转义

语法语法（伪 Backus-Naur 形式；可能无效）

special_character ::= "[" | "]" | "|" | "\\"
text_character ::= !special_character | "\\\\" | "\\[" | "\\]" | "\\|"
text ::= text text_character | text_character | text "|" | "|"
sequence_of_nodes ::= sequence_of_nodes node | node
node ::= text | "[" + sequence_of_nodes + "]" | "[]"

语法示例

[to-do list|
    [buy some groceries|[
        lettuce |
        cucumber |
        ketchup
    ]]
    [finish NXML|[
        add syntax explanation to the README |
        update syntax examples |
        rewrite the parser
    ]]
    [do the homework]
]


[user|
    [id|123]
    [name|Paul]
    [surname|Brown]
    [profession|Architect]
    [friend ids|[234|345|456]]
]


[
    [message|
        [from|Alice]
        [to|Bob]
        [contents|Hello!]
    ]
    [message|
        [from|Bob]
        [to|Alice]
        [contents|Hi!]
    ]
]


[ARTICLE|
    [TITLE|Cookies are good]
    [CONTENTS|
        [PARAGRAPH|
            [OUTER REFERENCE|[URL|https://en.wikipedia.org/wiki/Cookie][TEXT|Cookies]] are good!
        ]
    ]
]


you can use the sequential parser to parse bare sequential nodes |
something |
something


an empty text node! -> || <- here it is!
another one, this time inside a sequence: [|] (it is between the opening bracket and the vertical bar)

使用此库时应考虑的事项

• 此库不会修剪文本节点末尾或开头的空白，以提供更好的灵活性。修剪过多的空白是用户的责任。