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Turtle.PEG.js
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{
// fake RDF interface to enable live debugging.
// console.log("start");
// RDF = {
// Dataset: function () {
// return {
// triples: [],
// addComment: function () {},
// push: function (t) { this.triples.push(t); },
// toString: function () { return this.triples.join("\n"); }
// };
// },
// createIRIResolver: function () {
// var map = {};
// return {
// setPrefix: function (pre, url) { map[pre] = url; },
// getPrefix: function (pre) { return map[pre]; },
// getAbsoluteIRI: function (r) { return r; }
// };
// },
// createBNodeScope: function () { return {}; },
// Position5: function () { return {}; },
// IRI: function (l) { return l; },
// RDFLiteral: function (v, l, d) { return v+"@"+l+"^^"+d; },
// Comment: function () { return {}; },
// Triple: function (s, p, o) { return s+" "+p+" "+o+" ."; }
// };
function createStack () {
var ret = [];
ret.peek = function () { return this.slice(-1)[0]};
ret.replace = function (elt) { this[this.length-1] = elt; };
return ret;
}
var curSubject = createStack();
var curPredicate = createStack();
var curListHead = createStack();
var curListTail = createStack();
var insertTripleAt = createStack(); // where to place (collection) triples for nice defaults
var db = RDF.Dataset();
db.nextInsertAt = null;
db.add = function (s, p, o) {
var t = RDF.Triple(s, p, o);
if (this.nextInsertAt == null)
this.push(t);
else {
this.insertAt(this.nextInsertAt, t);
this.nextInsertAt = null;
}
}
var RDF_NS = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#';
var XSD_NS = 'http://www.w3.org/2001/XMLSchema#'
var iriResolver = ("iriResolver" in options) ? options.iriResolver : RDF.createIRIResolver();
var bnodeScope = ("bnodeScope" in options) ? options.bnodeScope : RDF.createBNodeScope();
iriResolver.errorHandler = function (message) {
error(message);
};
function _literalHere (value, type) {
var dt = RDF.IRI(XSD_NS+type, RDF.Position5(text(), line(), column(), offset(), value.length));
var pos = RDF.Position5(text(), line(), column(), offset(), value.length);
return RDF.RDFLiteral(value, undefined, dt, pos);
}
function offset() {
return location().start.offset;
}
function line() {
return location().start.line;
}
function column() {
return location().start.column;
}
}
turtleDoc = _ statement* _ {
if (curSubject.length > 0 ||
curPredicate.length > 0) {
return {_: "Bad end state:",
s:curSubject,
p:curPredicate,
t:db.triples.map(
function (t) { return t.toString(); }
).join('\n')
};
}
// t:db.triples.map( function (t) { console.log(t.toString()); } )
return db;
}
statement = directive _ / triples _ '.' _
directive = prefix / base / sparqlPrefix / sparqlBase
prefix = keyword:PREFIX _ pre:PNAME_NS _ i:IRIREF _ '.' { iriResolver.setPrefix(pre.text, i.lex); db.prefixDecl(keyword, pre, i); }
base = BASE _ i:IRIREF _ '.' { iriResolver.setBase(i.lex); }
sparqlPrefix = keyword:SPARQL_PREFIX _ pre:PNAME_NS _ i:IRIREF { iriResolver.setPrefix(pre.text, i.lex); db.prefixDecl(keyword, pre, i); }
sparqlBase = SPARQL_BASE _ i:IRIREF { iriResolver.setBase(i.lex); }
triples = _ subject predicateObjectList { curSubject.pop(); }
/ _ blankNodePropertyList predicateObjectList? { curSubject.pop(); }
subject = i:iri { curSubject.push(i); }
/ b:BlankNode { curSubject.push(b); }
predicateObjectList = _ verb objectList (_ ';' _ (verb objectList)* )*
verb = v:predicate { curPredicate.push(v); }
/ v:RDF_TYPE { curPredicate.push(v); }
predicate = iri
objectList = _ o:object oz:(_ ',' _ object)* { curPredicate.pop(); }
object = n:iri { db.add(curSubject.peek(), curPredicate.peek(), n); return n; }
/ n:BlankNode { db.add(curSubject.peek(), curPredicate.peek(), n); return n; }
/ n:collection { db.add(curSubject.peek(), curPredicate.peek(), n); return n; }
/ n:blankNodePropertyList { db.add(curSubject.peek(), curPredicate.peek(), n); return n; }
/ n:literal { db.add(curSubject.peek(), curPredicate.peek(), n); return n; }
blankNodePropertyList = s:_lbracket predicateObjectList _ _rbracket { curSubject.pop(); return s; }
_lbracket = '[' {
var ret = RDF.BNode(bnodeScope.nextLabel(), RDF.Position5(text(), line(), column(), offset(), 1));
curSubject.push(ret);
return ret;
}
_rbracket = ']'
// Collections
collection = _openCollection _ _members* r:_closeCollection { return r; }
_openCollection = '(' {
curListHead.push(null);
curListTail.push(null);
insertTripleAt.push(db.triples.length);
curSubject.push(RDF.BNode(bnodeScope.nextLabel(), RDF.Position5(text(), line(), column()-1, offset()-1, 1)));
curPredicate.push(RDF.IRI(RDF_NS+'first', RDF.Position5(text(), line(), column(), offset(), 1)));
}
_closeCollection= ')' {
curSubject.pop();
curPredicate.pop();
var nil = RDF.IRI(RDF_NS+'nil', RDF.Position5(text(), line(), column(), offset(), 1));
if (curListHead.peek() != null) // got some elements
db.add(curListTail.peek(),
RDF.IRI(RDF_NS+'rest', RDF.Position5(text(), line(), column()-1, offset()-1, 1)),
nil);
db.nextInsertAt = insertTripleAt.pop();
curListTail.pop();
var ret = curListHead.pop();
return (ret == null) ? nil : ret;
}
_members = o:object _ {
var cur = curSubject.peek();
if (curListHead.peek() == null)
curListHead.replace(cur);
else {
db.nextInsertAt = db.triples.length-1;
db.add(curListTail.peek(), // last tail
RDF.IRI(RDF_NS+'rest', RDF.Position5(text(), line(), column(), offset(), 1)),
cur);
db.nextInsertAt = null;
}
var next = RDF.BNode(bnodeScope.nextLabel(), RDF.Position5(text(), line(), o._pos.column-2, o._pos.offset-2, 1));
curListTail.replace(cur);
curSubject.replace(next);
curPredicate.replace(RDF.IRI(RDF_NS+'first', RDF.Position5(text(), line(), o._pos.column-1, o._pos.offset-1, 1)));
}
// Literals
literal = RDFLiteral / NumericLiteral / BooleanLiteral
NumericLiteral = value:DOUBLE { return _literalHere(value, 'double'); }
/ value:DECIMAL { return _literalHere(value, 'decimal'); }
/ value:INTEGER { return _literalHere(value, 'integer'); }
RDFLiteral = s:String _ l:LANGTAG { return RDF.RDFLiteral(s.lex, l, undefined, RDF.Position5(text(), s.line, s.column, s.offset, s.length+1+l._pos.width)); }
/ s:String _ '^^' _ i:iri { return RDF.RDFLiteral(s.lex, undefined, i, RDF.Position5(text(), s.line, s.column, s.offset, s.length+2+i._pos.width)); }
/ s:String { return RDF.RDFLiteral(s.lex, undefined, undefined, RDF.Position5(text(), s.line, s.column, s.offset, s.length)); }
BooleanLiteral = 'true' { return _literalHere('true', 'boolean'); }
/ 'false' { return _literalHere('false', 'boolean'); }
String = STRING_LITERAL_LONG1 / STRING_LITERAL_LONG2 / STRING_LITERAL1 / STRING_LITERAL2
// IRIs
iri = IRIREF / PrefixedName
PrefixedName999 = ln:PNAME_LN {
return RDF.IRI(iriResolver.getAbsoluteIRI(iriResolver.getPrefix(ln.prefix) + ln.lex), RDF.Position5(text(), line(), column(), offset(), ln.width));
}
/ p:PNAME_NS {
return RDF.IRI(iriResolver.getAbsoluteIRI(iriResolver.getPrefix(p.text)), p._pos);
}
PrefixedName = ln:ERR_PNAME_LN {
// @@ test for valid PNAME_LN
return RDF.IRI(iriResolver.getAbsoluteIRI(iriResolver.getPrefix(ln.prefix) + ln.lex), RDF.Position5(text(), line(), column(), offset(), ln.width));
}
/ p:ERR_PNAME_NS {
// @@ test for valid PNAME_NS
return RDF.IRI(iriResolver.getAbsoluteIRI(iriResolver.getPrefix(p.text)), p._pos);
}
BlankNode = BLANK_NODE_LABEL / ANON
// Terminals:
RDF_TYPE = 'a' { return RDF.IRI(RDF_NS+'type', RDF.Position5(text(), line(), column(), offset(), 1)); }
IRIREF = b:_IRIREF_BEGIN s:([^\u0000-\u0020<>\"{}|^`\\] / UCHAR)* e:_IRIREF_END {
return RDF.IRI(iriResolver.getAbsoluteIRI(s.join('')), RDF.Position5(text(), line(), column(), offset(), e-b+1));
}
_IRIREF_BEGIN = '<' { return offset(); }
_IRIREF_END = '>' { return offset(); }
PREFIX = '@prefix' { return {_: "Keyword", text: text(), _pos: RDF.Position5(text(), line(), column(), offset(), text().length)}; }
BASE = '@base'
SPARQL_PREFIX = [Pp][Rr][Ee][Ff][Ii][Xx] { return {_: "Keyword", text: text(), _pos: RDF.Position5(text(), line(), column(), offset(), text().length)}; }
SPARQL_BASE = [Bb][Aa][Ss][Ee]
PNAME_NS = pre:PN_PREFIX? ':' { return {text:pre ? pre : '', _pos: RDF.Position5(text(), line(), column(), offset(), text().length+1)}; } // pre+'|' : '|';
PNAME_LN = pre:PNAME_NS l:PN_LOCAL {
return {width: pre.text.length+1+l.length, prefix:pre.text, lex:l};
}
BLANK_NODE_LABEL = '_:' first:(PN_CHARS_U / [0-9]) rest:BLANK_NODE_LABEL2? {
return RDF.BNode(bnodeScope.uniqueLabel(first+(rest ? rest : '')), RDF.Position5(text(), line(), column(), offset(), 2+first.length+(rest ? rest.length : 0)));
}
BLANK_NODE_LABEL2 = l:'.' r:BLANK_NODE_LABEL2 { return l+r; }
/ l:PN_CHARS r:BLANK_NODE_LABEL2? { return r ? l+r : l; }
LANGTAG = '@' s:([a-zA-Z]+ ('-' [a-zA-Z0-9]+)*) {
s[1].splice(0, 0, '');
var str = s[0].join('')+s[1].reduce(function(a,b){return a+b[0]+b[1].join('');});
return RDF.LangTag(str, RDF.Position5(text(), line(), column()+1, offset()+1, str.length));
}
INTEGER = sign:[+-]? s:[0-9]+ { if (!sign) sign=''; return sign+s.join(''); }
DECIMAL = sign:[+-]? l:[0-9]* '.' d:[0-9]+ { if (!sign) sign=''; return sign+l.join('')+'.'+d.join(''); }
DOUBLE = sign:[+-]? v:_DOUBLE_VAL { if (!sign) sign=''; return sign+v; }
_DOUBLE_VAL = m:[0-9]+ '.' d:[0-9]* e:EXPONENT { return m.join('')+'.'+d.join('')+e; }
/ '.' d:[0-9]+ e:EXPONENT { return '.'+d.join('')+e; }
/ m:[0-9]+ e:EXPONENT { return m.join('')+e; }
EXPONENT = e:[eE] sign:[+-]? l:[0-9]+ { if (!sign) sign=''; return e+sign+l.join(''); }
STRING_LITERAL1 = b:_STRING_LITERAL1_DELIM s:_NON_1* e:_STRING_LITERAL1_DELIM { return {line:line(), column:column(), offset:offset(), length:e-b+1, lex:s.join('')}; }
_STRING_LITERAL1_DELIM = "'" { return offset(); }
_NON_1 = [^\u0027\u005C\u000A\u000D] / ECHAR / UCHAR
STRING_LITERAL2 = b:_STRING_LITERAL2_DELIM s:_NON_2* e:_STRING_LITERAL2_DELIM { return {line:line(), column:column(), offset:offset(), length:e-b+1, lex:s.join('')}; }
_STRING_LITERAL2_DELIM = '"' { return offset(); }
_NON_2 = [^\u0022\u005C\u000A\u000D] / ECHAR / UCHAR
STRING_LITERAL_LONG1 = b:_STRING_LITERAL_LONG1_DELIM s:_NON_LONG1* e:_STRING_LITERAL_LONG1_DELIM { return {line:line(), column:column(), offset:offset(), length:e-b+3, lex:s.join('')}; }
_STRING_LITERAL_LONG1_DELIM = "'''" { return offset(); }
_NON_LONG1 = q:_LONG1? c:[^'\\] { // '
return q ? q+c : c;
}
/ ECHAR / UCHAR
_LONG1 = "''" / "'"
STRING_LITERAL_LONG2 = b:_STRING_LITERAL_LONG2_DELIM s:_NON_LONG2* e:_STRING_LITERAL_LONG2_DELIM { return {line:line(), column:column(), offset:offset(), length:e-b+3, lex:s.join('')}; }
_STRING_LITERAL_LONG2_DELIM = '"""' { return offset(); }
_NON_LONG2 = q:_LONG2? c:[^"\\] { // "
return q ? q+c : c;
}
/ ECHAR / UCHAR
_LONG2 = '""' / '"'
UCHAR = '\\u's:(HEX HEX HEX HEX) { return String.fromCharCode(parseInt(s.join(''), 16)); }
/ '\\U's:(HEX HEX HEX HEX HEX HEX HEX HEX) {
var code = parseInt(s.join(''), 16);
if (code<0x10000) { // RDFa.1.2.0.js:2712
return String.fromCharCode(code);
} else {
// Treat this as surrogate pairs until use cases for me to push it up to the toString function. (sigh)
var n = code - 0x10000;
var h = n >> 10;
var l = n & 0x3ff;
return String.fromCharCode(h + 0xd800) + String.fromCharCode(l + 0xdc00);
}
}
ECHAR = '\\' r:[tbnrf"'\\] { // "
return r=='t' ? '\t'
: r=='b' ? '\b'
: r=='n' ? '\n'
: r=='r' ? '\r'
: r=='f' ? '\f'
: r=='"' ? '"'
: r=='\'' ? '\''
: '\\'
}
ANON = '[' s:_ ']' { return RDF.BNode(bnodeScope.nextLabel(), RDF.Position5(text(), line(), column(), offset(), s.length+2)); }
PN_CHARS_BASE = [A-Z] / [a-z]
/ [\u00C0-\u00D6] / [\u00D8-\u00F6] / [\u00F8-\u02FF]
/ [\u0370-\u037D] / [\u037F-\u1FFF]
/ [\u200C-\u200D] / [\u2070-\u218F]
/ [\u2C00-\u2FEF] // / [\u3001-\uD7FF]
/ [\u3001-\uFFFD] // ouch, this stings!
// anything else kills PEG
// / [\uF900-\uFDCF] / [\uFDF0-\uFFFD] /
// / [\uD800-\uDB7F] [\uDC00-\uDFFF] // UTF-16 for [#x10000-#xEFFFF]
PN_CHARS_U = PN_CHARS_BASE / '_'
PN_CHARS = PN_CHARS_U / '-' / [0-9] / [\u00B7] / [\u0300-\u036F] / [\u203F-\u2040]
PN_PREFIX = b:PN_CHARS_BASE r:PN_PREFIX2? { return r ? b+r : b; }
PN_PREFIX2 = l:'.' r:PN_PREFIX2 { return l+r; }
/ l:PN_CHARS r:PN_PREFIX2? { return r ? l+r : l; }
PN_LOCAL = l:(PN_CHARS_U / ':' / [0-9] / PLX) r:PN_LOCAL2?
{ return r ? l+r : l; }
PN_LOCAL2 = l:'.' r:PN_LOCAL2 { return l+r; }
/ l:PN_CHARS_colon_PLX r:PN_LOCAL2? { return r ? l+r : l; }
PN_CHARS_colon_PLX = PN_CHARS / ':' / PLX
PLX = PERCENT / PN_LOCAL_ESC
PERCENT = '%' l:HEX r:HEX { return '%'+l+r; }
HEX = [0-9] / [A-F] / [a-f]
PN_LOCAL_ESC = '\\' r:[_~.!$&'()*+,;=/?#@%-] { return r; } //'// for syntax highlighting gone awry
// ERR_*: non-validating PN parser -- @@ needs runtime switch
ERR_PNAME_NS = pre:ERR_PN_PREFIX? ':' { return {text:pre ? pre : '', _pos: RDF.Position5(text(), line(), column(), offset(), text().length+1)}; } // pre+'|' : '|';
ERR_PNAME_LN = pre:ERR_PNAME_NS l:ERR_PN_LOCAL {
return {width: pre.text.length+1+l.length, prefix:pre.text, lex:l};
}
ERR_PN_CHARS_BASE = [A-Z] / [a-z]
/ [\u0080-\uFFFD] // anything
ERR_PN_CHARS_U = ERR_PN_CHARS_BASE / '_'
ERR_PN_CHARS = ERR_PN_CHARS_U / '-' / [0-9]
ERR_PN_PREFIX = b:ERR_PN_CHARS_BASE r:ERR_PN_PREFIX2? { return r ? b+r : b; }
ERR_PN_PREFIX2 = l:'.' r:ERR_PN_PREFIX2 { return l+r; }
/ l:ERR_PN_CHARS r:ERR_PN_PREFIX2? { return r ? l+r : l; }
ERR_PN_LOCAL = l:(ERR_PN_CHARS_U / ':' / [0-9] / PLX) r:ERR_PN_LOCAL2?
{ return r ? l+r : l; }
ERR_PN_LOCAL2 = l:'.' r:ERR_PN_LOCAL2 { return l+r; }
/ l:ERR_PN_CHARS_colon_PLX r:ERR_PN_LOCAL2? { return r ? l+r : l; }
ERR_PN_CHARS_colon_PLX = ERR_PN_CHARS / ':' / PLX
_ = x:(WS / COMMENT)* { return ''; }
WS = [ \t\r\n]+ { return ''; }
COMMENT = "#" comment:[^\r\n]* { db.addComment(new RDF.Comment(comment.join(''), RDF.Position5(text(), line(), column(), offset(), comment.length+1))); }
// [/terminals]