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| <div class="title">Grammar of the schema language </div> </div> |
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| <div class="textblock"><p><a class="anchor" id="md_Grammar"></a></p> |
| <p>schema = include* ( namespace_decl | type_decl | enum_decl | root_decl | file_extension_decl | file_identifier_decl | attribute_decl | rpc_decl | object )*</p> |
| <p>include = <code>include</code> string_constant <code>;</code></p> |
| <p>namespace_decl = <code>namespace</code> ident ( <code>.</code> ident )* <code>;</code></p> |
| <p>attribute_decl = <code>attribute</code> ident | <code>"</tt>ident<tt>"</code> <code>;</code></p> |
| <p>type_decl = ( <code>table</code> | <code>struct</code> ) ident metadata <code>{</code> field_decl+ <code>}</code></p> |
| <p>enum_decl = ( <code>enum</code> ident <code>:</code> type | <code>union</code> ident ) metadata <code>{</code> commasep( enumval_decl ) <code>}</code></p> |
| <p>root_decl = <code>root_type</code> ident <code>;</code></p> |
| <p>field_decl = ident <code>:</code> type [ <code>=</code> scalar ] metadata <code>;</code></p> |
| <p>rpc_decl = <code>rpc_service</code> ident <code>{</code> rpc_method+ <code>}</code></p> |
| <p>rpc_method = ident <code>(</code> ident <code>)</code> <code>:</code> ident metadata <code>;</code></p> |
| <p>type = <code>bool</code> | <code>byte</code> | <code>ubyte</code> | <code>short</code> | <code>ushort</code> | <code>int</code> | <code>uint</code> | <code>float</code> | <code>long</code> | <code>ulong</code> | <code>double</code> | <code>int8</code> | <code>uint8</code> | <code>int16</code> | <code>uint16</code> | <code>int32</code> | <code>uint32</code>| <code>int64</code> | <code>uint64</code> | <code>float32</code> | <code>float64</code> | <code>string</code> | <code>[</code> type <code>]</code> | ident</p> |
| <p>enumval_decl = ident [ <code>=</code> integer_constant ]</p> |
| <p>metadata = [ <code>(</code> commasep( ident [ <code>:</code> single_value ] ) <code>)</code> ]</p> |
| <p>scalar = boolean_constant | integer_constant | float_constant</p> |
| <p>object = <code>{</code> commasep( ident <code>:</code> value ) <code>}</code></p> |
| <p>single_value = scalar | string_constant</p> |
| <p>value = single_value | object | <code>[</code> commasep( value ) <code>]</code></p> |
| <p>commasep(x) = [ x ( <code>,</code> x )* ]</p> |
| <p>file_extension_decl = <code>file_extension</code> string_constant <code>;</code></p> |
| <p>file_identifier_decl = <code>file_identifier</code> string_constant <code>;</code></p> |
| <p>string_constant = <code>\".*?\\"</code></p> |
| <p>ident = <code>[a-zA-Z_][a-zA-Z0-9_]*</code></p> |
| <p><code>[:digit:]</code> = <code>[0-9]</code></p> |
| <p><code>[:xdigit:]</code> = <code>[0-9a-fA-F]</code></p> |
| <p>dec_integer_constant = <code>[-+]?[:digit:]+</code></p> |
| <p>hex_integer_constant = <code>[-+]?0[xX][:xdigit:]+</code></p> |
| <p>integer_constant = dec_integer_constant | hex_integer_constant</p> |
| <p>dec_float_constant = <code>[-+]?(([.][:digit:]+)|([:digit:]+[.][:digit:]*)|([:digit:]+))([eE][-+]?[:digit:]+)?</code></p> |
| <p>hex_float_constant = <code>[-+]?0[xX](([.][:xdigit:]+)|([:xdigit:]+[.][:xdigit:]*)|([:xdigit:]+))([pP][-+]?[:digit:]+)</code></p> |
| <p>special_float_constant = <code>[-+]?(nan|inf|infinity)</code></p> |
| <p>float_constant = dec_float_constant | hex_float_constant | special_float_constant</p> |
| <p>boolean_constant = <code>true</code> | <code>false</code> </p> |
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