/
toXML.py
executable file
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/
toXML.py
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#!/usr/local/bin/python
"""
$Id: toXML.py,v 1.39 2007/06/26 02:36:15 syosi Exp $
This module implements basic sources and sinks for RDF data.
It defines a stream interface for such data.
It has a command line interface, can work as a web query engine,
and has built in test(), all of which demosntrate how it is used.
To make a new RDF processor, subclass RDFSink.
See also:
Notation 3
http://www.w3.org/DesignIssues/Notation3
Closed World Machine - and RDF Processor
http;//www.w3.org/2000/10/swap/cwm
To DO: See also "@@" in comments
Internationlization:
- Decode incoming N3 file as unicode
- Encode outgoing file
- unicode \u (??) escapes in parse
- unicode \u (??) escapes in string output
Note currently unicode strings work in this code
but fail when they are output into the python debugger
interactive window.
______________________________________________
Module originally by Dan Connolly.
TimBL added RDF stream model.
"""
import string
import codecs # python 2-ism; for writing utf-8 in RDF/xml output
import urlparse
import urllib
import re
import sys
#import thing
from uripath import refTo
from diag import progress
from random import choice, seed
seed(23)
from xmlC14n import Canonicalize
import RDFSink
from set_importer import Set
from RDFSink import CONTEXT, PRED, SUBJ, OBJ, PARTS, ALL4
from RDFSink import FORMULA, LITERAL, XMLLITERAL, LITERAL_DT, LITERAL_LANG, ANONYMOUS, SYMBOL
from RDFSink import Logic_NS, NODE_MERGE_URI
from isXML import isXMLChar, NCNameChar, NCNameStartChar, setXMLVersion, getXMLVersion
N3_forSome_URI = RDFSink.forSomeSym
N3_forAll_URI = RDFSink.forAllSym
# Magic resources we know about
RDF_type_URI = "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"
RDF_NS_URI = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
DAML_NS=DPO_NS = "http://www.daml.org/2001/03/daml+oil#" # DAML plus oil
DAML_sameAs_URI = DPO_NS+"sameAs"
parsesTo_URI = Logic_NS + "parsesTo"
RDF_spec = "http://www.w3.org/TR/REC-rdf-syntax/"
ADDED_HASH = "#" # Stop where we use this in case we want to remove it!
# This is the hash on namespace URIs
# Should the internal representation of lists be with DAML:first and :rest?
DAML_LISTS = 1 # Else don't do these - do the funny compact ones- not a good idea after all
RDF_type = ( SYMBOL , RDF_type_URI )
DAML_sameAs = ( SYMBOL, DAML_sameAs_URI )
List_NS = RDF_NS_URI # We have to pick just one all the time
# For lists:
N3_first = (SYMBOL, List_NS + "first")
N3_rest = (SYMBOL, List_NS + "rest")
RDF_li = (SYMBOL, List_NS + "li")
# N3_only = (SYMBOL, List_NS + "only")
N3_nil = (SYMBOL, List_NS + "nil")
N3_List = (SYMBOL, List_NS + "List")
N3_Empty = (SYMBOL, List_NS + "Empty")
XML_NS_URI = "http://www.w3.org/XML/1998/namespace"
option_noregen = 0 # If set, do not regenerate genids on output
########################## RDF 1.0 Syntax generator
global _namechars
_namechars = string.lowercase + string.uppercase + string.digits + '_-'
def dummyWrite(x):
pass
class ToRDF(RDFSink.RDFStructuredOutput):
"""keeps track of most recent subject, reuses it"""
_valChars = string.lowercase + string.uppercase + string.digits + "_ !#$%&().,+*/"
#@ Not actually complete, and can encode anyway
def __init__(self, outFp, thisURI=None, base=None, flags=""):
RDFSink.RDFSink.__init__(self)
if outFp == None:
self._xwr = XMLWriter(dummyWrite, self)
else:
dummyEnc, dummyDec, dummyReader, encWriter = codecs.lookup('utf-8')
z = encWriter(outFp)
zw = z.write
self._xwr = XMLWriter(zw, self)
self._subj = None
self._base = base
self._formula = None # Where do we get this from? The outermost formula
if base == None: self._base = thisURI
self._thisDoc = thisURI
self._flags = flags
self._nodeID = {}
self._nextnodeID = 0
self._docOpen = 0 # Delay doc open <rdf:RDF .. till after binds
def doNothing():
pass
self._toDo = doNothing
self.namespace_redirections = {}
self.illegals = Set()
self.stack = [0]
#@@I18N
_rdfns = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'
def dummyClone(self):
"retun a version of myself which will only count occurrences"
return ToRDF(None, self._thisDoc, base=self._base, flags=self._flags )
def bind(self, prefix, namespace):
if prefix in self.namespace_redirections:
prefix = self.namespace_redirections[prefix]
else:
realPrefix = prefix
while prefix in self.illegals or prefix[:3] == 'xml':
prefix = choice(string.ascii_letters) + prefix
if realPrefix is not prefix:
self.illegals.add(prefix)
self.namespace_redirections[realPrefix] = prefix
return RDFSink.RDFStructuredOutput.bind(self, prefix, namespace)
def startDoc(self):
pass
flagDocumentation = """
Flags to control RDF/XML output (after --rdf=) areas follows:
b - Don't use nodeIDs for Bnodes
c - Don't use elements as class names
d - Default namespace supressed.
l - Don't use RDF collection syntax for lists
r - Relative URI suppression. Always use absolute URIs.
z - Allow relative URIs for namespaces
"""
def endDoc(self, rootFormulaPair=None):
if self.stayOpen: return # Ignore close if stayOpen is set, (for concatenation)
self.flushStart() # Note: can't just leave empty doc if not started: bad XML
if self._subj:
self._xwr.endElement() # </rdf:Description>
self._subj = None
self._xwr.endElement() # </rdf:RDF>
self._xwr.endDocument()
def makeComment(self, str):
if self._docOpen:
self._xwr.makeComment(str)
return
toDo = self._toDo
def toDoMore():
toDo()
self._xwr.makeComment(str)
self._toDo = toDoMore
def referenceTo(self, uri):
"Conditional relative URI"
if "r" in self._flags or self._base == None:
return uri
return refTo(self._base, uri)
def flushStart(self):
if not self._docOpen:
if getXMLVersion() != '1.0':
self._xwr.makePI('xml version="%s"' % getXMLVersion())
self._toDo()
if self.prefixes.get(RDF_NS_URI, ":::") == ":::":
if self.namespaces.get("rdf", ":::") ==":::":
self.bind("rdf", RDF_NS_URI)
## else:
## ns = findLegal(self.prefixes, RDF_NS_URI)
## self.bind(ns, RDF_NS_URI)
# if self.prefixes.get(Logic_NS, ":::") == ":::":
# if self.namespaces.get("log", ":::") ==":::":
# self.bind("log", Logic_NS)
ats = []
ps = self.prefixes.values()
ps.sort() # Cannonicalize output somewhat
if self.defaultNamespace and "d" not in self._flags:
if "z" in self._flags:
ats.append(('xmlns',
self.referenceTo(self.defaultNamespace)))
else:
ats.append(('xmlns',self.defaultNamespace))
for pfx in ps:
nsvalue = self.namespaces[pfx]
if "z" in self._flags:
nsvalue = self.referenceTo( nsvalue)
ats.append(('xmlns:'+pfx, nsvalue))
self._xwr.startElement(RDF_NS_URI+'RDF', ats, self.prefixes)
self._subj = None
self._nextId = 0
self._docOpen = 1
def makeStatement(self, tuple, why=None, aIsPossible=0):
context, pred, subj, obj = tuple # Context is ignored
if self.stack[-1]:
if pred == N3_first:
pred = RDF_li
elif pred == RDF_type and obj == N3_List:
return # We knew
elif pred == RDF_type and obj == N3_Empty:
return # not how we would have put it but never mind
elif pred == N3_rest:
return # Ignore rest
else: raise RuntimeError ("Should only see %s and %s in list mode, for tuple %s and stack %s"
%(N3_first, N3_rest, `tuple`, `self.stack`))
if subj == context: # and context == self._formula:
if pred == (SYMBOL, N3_forAll_URI):
progress("Ignoring universal quantification of ", obj)
return
elif pred == (SYMBOL, N3_forSome_URI):
nid = self._nodeID.get(obj, None)
if nid == None and not("b" in self._flags):
self._nextnodeID += 1
nid = 'b'+`self._nextnodeID`
self._nodeID[obj] = nid
#progress("object is now", obj, nid)
return
if subj[0] not in (SYMBOL, ANONYMOUS, LITERAL, LITERAL_DT, LITERAL_LANG):
progress("Warning: because subject is not symbol, bnode or literal, Ignoring ", tuple)
return
# progress("@@@ subject node is ", subj)
self.flushStart()
if self._formula == None:
self._formula = context # Asssume first statement is in outermost context @@
predn = self.referenceTo( pred[1])
subjn = self.referenceTo( subj[1])
if self._subj != subj:
if self._subj:
self._xwr.endElement()
self._subj = subj
if (pred == (SYMBOL, RDF_type_URI)# Special case starting with rdf:type as element name
and obj[0] != LITERAL
and "c" not in self._flags): # "c" flag suppresses class element syntax on RDF output
# self._xwr.startElement(obj[1], [(RDF_NS_URI+" about", subjn),], self.prefixes)
# return
start_tag = obj[1]
else:
start_tag = RDF_NS_URI+'Description'
# progress("@@ Start tag: %s" % start_tag)
if subj[0] == SYMBOL or subj[0] == ANONYMOUS:
nid = self._nodeID.get(subj, None)
if nid == None:
if subj[0] == ANONYMOUS:
self._xwr.startElement(start_tag,
[], self.prefixes)
else:
self._xwr.startElement(start_tag,
[(RDF_NS_URI+" about", subjn),], self.prefixes)
else:
self._xwr.startElement(start_tag,
[(RDF_NS_URI+" nodeID", nid),], self.prefixes)
if start_tag != RDF_NS_URI+'Description':
return
elif subj[0] == LITERAL:
raise ValueError(
"""Bad subject of statement: %s.
RDF/XML cannot serialize a graph in which a subject is a literal.""" % subj[1])
# See http://lists.w3.org/Archives/Public/public-cwm-bugs/2004Aug/0014.html
v = subj[1]
attrs = [] # Literal
if type(v) is type((1,1)):
v, dt, lang = v
if dt != None: attrs.append((RDF_NS_URI+'datatype', dt))
if lang != None: attrs.append((XML_NS_URI+' lang', lang))
self._xwr.startElement(RDF_NS_URI+'Description',
[], self.prefixes)
self._xwr.startElement(RDF_NS_URI+"is", attrs, self.prefixes)
self._xwr.data(v)
self._xwr.endElement()
else:
raise RuntimeError("Unexpected subject", `subj`)
if obj[0] not in (XMLLITERAL, LITERAL, LITERAL_DT, LITERAL_LANG):
nid = self._nodeID.get(obj, None)
if nid == None:
objn = self.referenceTo( obj[1])
# progress("@@@ objn=%s, obj[1]=%s" %(objn, obj[1]))
nid2 = self._nodeID.get(pred, None)
if nid2 is None:
self._xwr.emptyElement(pred[1], [(RDF_NS_URI+' resource', objn)], self.prefixes)
else:
bNodePredicate()
else:
self._xwr.emptyElement(pred[1], [(RDF_NS_URI+' nodeID', nid)], self.prefixes)
return
attrs = [] # Literal
v = obj[1]
if obj[0] == XMLLITERAL:
attrs.append((RDF_NS_URI+' parseType', 'Literal'))
elif obj[0] == LITERAL_DT:
v, dt = v
if dt != None: attrs.append((RDF_NS_URI+' datatype', dt))
elif obj[0] == LITERAL_LANG:
v, lang = v
if lang != None: attrs.append((XML_NS_URI+' lang', lang))
nid = self._nodeID.get(pred, None)
if nid is None:
self._xwr.startElement(pred[1], attrs, self.prefixes)
else:
bNodePredicate()
if obj[0] == XMLLITERAL:
# XML literal
dom = obj[1]
self._xwr.passXML(''.join([Canonicalize(x) for x in dom.childNodes]))
else:
self._xwr.data(v)
self._xwr.endElement()
# Below is for writing an anonymous node which is the object of only one arc
# This is the arc leading to it.
# As object
def startAnonymous(self, tuple):
self.startWithParseType("Resource", tuple)
def endAnonymous(self, subject, verb): # Remind me where we are
self._xwr.endElement()
self._subj = subject # @@@ This all needs to be thought about!
# Below we do anonymous top level node - arrows only leave this circle
# There is no list synmtax for subject in RDF
# As subject
def startAnonymousNode(self, subj, isList=0):
# progress("@@@ Anonymous node is ", subj)
self.flushStart()
if self._subj:
self._xwr.endElement()
self._subj = None
self._xwr.startElement(RDF_NS_URI+'Description', [], self.prefixes)
self._subj = subj # The object is not the subject context
def endAnonymousNode(self, subj=None): # Remove context
return #If a new subject is started, they'll know to close this one
self._xwr.endElement()
self._subj = None
# LISTS
#
# Below is for writing an anonymous node which is the object of only one arc
# This is the arc leading to it.
# As object
def startListObject(self, tuple, isList =0):
self._pred = RDF_li
self.startWithParseType('Collection', tuple)
return
def endListObject(self, subject, verb): # Remind me where we are
self._xwr.endElement()
self._subj = subject # @@@ This all needs to be thought about!
return
def startWithParseType(self, parseType, tuple):
self.flushStart()
context, pred, subj, obj = tuple
if self._subj != subj:
if self._subj:
self._xwr.endElement()
nid = self._nodeID.get(subj, None)
if nid == None:
subjn = self.referenceTo( subj[1])
attr = ((RDF_NS_URI+' about', subjn),)
if subj[0] == ANONYMOUS: attr = []
self._xwr.startElement(RDF_NS_URI + 'Description',
attr, self.prefixes)
else:
self._xwr.startElement(RDF_NS_URI + 'Description',
((RDF_NS_URI+' nodeID', nid),), self.prefixes)
self._subj = subj
nid = self._nodeID.get(pred, None)
if nid is None:
self._xwr.startElement(pred[1],
[(RDF_NS_URI+' parseType',parseType)], self.prefixes)
else:
bNodePredicate()
self._subj = obj # The object is now the current subject
return
# As subject:
def startListSubject(self, subj):
self.startAnonymousNode(self)
# @@@@@@ set flaf to do first/rest decomp
def endListSubject(self, subj):
self.endAnonymousNode(subj)
# Below we notate a nested formula
def startFormulaSubject(self, context): # Doesn't work with RDF sorry ILLEGAL
self.flushStart()
if self._subj:
self._xwr.endElement()
self._subj = None
self._xwr.startElement(RDF_NS_URI+'Description',
[],
self.prefixes)
self._xwr.startElement(NODE_MERGE_URI,
[(RDF_NS_URI+' parseType', "Quote")], self.prefixes)
self._subj = None
def endFormulaSubject(self, subj): # Remove context
if self._subj:
self._xwr.endElement() # End description if any
self._subj = 0
self._xwr.endElement() # End quote
self._subj = subj
def startFormulaObject(self, tuple):
self.flushStart()
context, pred, subj, obj = tuple
if self._subj != subj:
if self._subj:
self._xwr.endElement()
nid = self._nodeID.get(subj, None)
if nid == None:
progress("@@@Start anonymous node but not nodeID?", subj)
subjn = self.referenceTo( subj[1])
self._xwr.startElement(RDF_NS_URI + 'Description',
((RDF_NS_URI+' about', subjn),), self.prefixes)
else:
self._xwr.startElement(RDF_NS_URI + 'Description',
((RDF_NS_URI+' nodeID', nid),), self.prefixes)
self._subj = subj
# log_quote = self.prefixes[(SYMBOL, Logic_NS)] + ":Quote" # Qname yuk
self._xwr.startElement(pred[1], [(RDF_NS_URI+' parseType', "Quote")],
self.prefixes) # @@? Parsetype RDF? Formula?
self._subj = None
def endFormulaObject(self, pred, subj): # Remove context
if self._subj:
self._xwr.endElement() # </description> if any
self._subj = None
self._xwr.endElement() # end quote
self._subj = subj # restore context from start
# print "Ending formula, pred=", pred, "\n subj=", subj
# print "\nEnd bag object, pred=", `pred`[-12:]
########################################### XML Writer
class XMLWriter:
""" taken from
Id: tsv2xml.py,v 1.1 2000/10/02 19:41:02 connolly Exp connolly
Takes as argument a writer which does the (eg utf-8) encoding
"""
def __init__(self, encodingWriter, counter, squeaky=0, version='1.0'):
# self._outFp = outFp
self._encwr = encodingWriter
self._elts = []
self.squeaky = squeaky # No, not squeaky clean output
self.tab = 4 # Number of spaces to indent per level
self.needClose = 0 # 1 Means we need a ">" but save till later
self.noWS = 0 # 1 Means we cant use white space for prettiness
self.currentNS = None # @@@ Hack
self.counter = counter
self.version = version
#@@ on __del__, close all open elements?
_namechars = string.lowercase + string.uppercase + string.digits + '_-'
def newline(self, howmany=1):
if self.noWS:
self.noWS = 0
self.flushClose()
return
i = howmany
if i<1: i=1
self._encwr("\n\n\n\n"[:i])
self.indent()
def indent(self, extra=0):
self._encwr(' ' * ((len(self._elts)+extra) * self.tab))
self.flushClose()
def closeTag(self):
if self.squeaky:
self.needClose =1
else:
self._encwr(">")
def flushClose(self):
if self.needClose:
self._encwr(">")
self.needClose = 0
def passXML(self, st):
self.flushClose()
self._encwr(st)
def figurePrefix(self, uriref, rawAttrs, prefixes):
i = len(uriref)
while i>0:
if isXMLChar(uriref[i-1], NCNameChar): # uriref[i-1] in self._namechars:
i = i - 1
else:
break
while i<len(uriref):
if (not isXMLChar(uriref[i], NCNameStartChar)) or (uriref[i-1] == ':' and
uriref.rfind(':', 0, i-1) < 0):
i = i+1
else:
break
else:
# raise RuntimeError
if self.version == '1.0':
self.version = '1.1'
setXMLVersion('1.1')
return self.figurePrefix(uriref, rawAttrs, prefixes)
raise RuntimeError("this graph cannot be serialized in RDF/XML")
# We now have the largest possible namespace. Maybe a smaller one is defined already?
j = i
while j<len(uriref):
if (not isXMLChar(uriref[i], NCNameStartChar)) or uriref[i-1] == ':' or (uriref[:j] not in prefixes):
j = j + 1
else:
i = j
break
ln = uriref[i:]
#progress(ln)
ns = uriref[:i]
self.counter.countNamespace(ns)
# print "@@@ ns=",`ns`, "@@@ prefixes =", `prefixes`
nsSet = False
prefix = prefixes.get(ns, ":::")
attrs = []
for a, v in rawAttrs: # Caller can set default namespace
if a == "xmlns":
self.currentNS = v
nsSet = True
if ns != self.currentNS:
if prefix == ":::" or not prefix: # Can't trust stored null prefix
if nsSet:
prefix = findLegal(prefixes, ns)
prefixes[ns] = prefix
attrs.append(('xmlns:' + prefix, ns))
ln = prefix + ":" + ln
else:
attrs = [('xmlns', ns)]
self.currentNS = ns
else:
if prefix: ln = prefix + ":" + ln
for at, val in rawAttrs:
i = string.find(at," ") # USe space as delim like parser
if i<=0: # No namespace - that is fine for rdf syntax
# print ("# Warning: %s has no namespace on attr %s" %
# (ln, at))
attrs.append((at, val))
continue
ans = at[:i]
lan = at[i+1:]
if ans == XML_NS_URI: prefix = "xml"
else:
self.counter.countNamespace(ans)
prefix = prefixes.get(ans,":::")
if prefix == ":::":
#print "finding prefix for '%s'" % ans
prefix = findLegal(prefixes, ans)
#print "--found '%s'" % prefix
attrs.append(( 'xmlns:' + prefix, ans))
prefixes[ans] = prefix
## raise RuntimeError("#@@@@@ tag %s: atr %s has no prefix :-( in prefix table:\n%s" %
## (uriref, at, `prefixes`))
if prefix:
attrs.append(( prefix+":"+lan, val))
else:
attrs.append(( lan, val))
self.newline(3-len(self._elts)) # Newlines separate higher levels
self._encwr("<%s" % (ln,))
needNL = 0
for n, v in attrs:
if needNL:
self.newline()
self._encwr(" ")
self._encwr(" %s=\"" % (n, ))
if type(v) is type((1,1)):
# progress("@@@@@@ toXML.py 382: ", `v`)
v = `v`
xmldata(self._encwr, v, self.attrEsc)
self._encwr("\"")
needNL = 1
return (ln, attrs)
def makeComment(self, str):
self.newline()
self._encwr("<!-- " + str + "-->") # @@
def makePI(self, str):
self._encwr('<?' + str + '?>')
def startElement(self, n, attrs = [], prefixes={}):
oldNS = self.currentNS
ln, at2 = self.figurePrefix(n, attrs, prefixes)
self._elts.append((ln, oldNS))
self.closeTag()
def emptyElement(self, n, attrs=[], prefixes={}):
oldNS = self.currentNS
ln, at2 = self.figurePrefix(n, attrs, prefixes)
self.currentNS = oldNS # Forget change - no nesting
self._encwr("/")
self.closeTag()
def endElement(self):
n, self.currentNS = self._elts.pop()
self.newline()
self._encwr("</%s" % n)
self.closeTag()
dataEsc = re.compile(r"[\r<>&]") # timbl removed \n as can be in data
attrEsc = re.compile(r"[\r<>&'\"\n]")
def data(self, str):
#@@ throw an exception if the element stack is empty
# o = self._outFp
self.flushClose()
# xmldata(o.write, str, self.dataEsc)
xmldata(self._encwr, str, self.dataEsc)
self.noWS = 1 # Suppress whitespace - we are in data
def endDocument(self):
while len(self._elts) > 0:
self.endElement()
self.flushClose()
self._encwr("\n")
##NOTHING = -1
##SUBJECT = 0
##PREDICATE = 1
##OBJECT = 2
##
##FORMULA = 0
##LIST = 1
##ANONYMOUS = 2
##
##NO = 0
##STALE = 1
##FRESH = 2
import triple_maker
tm = triple_maker
def swap(List, a, b):
q = List[a]
List[a] = List[b]
List[b] = q
def findLegal(dict, str):
ns = Set(dict.values())
s = u''
k = len(str)
while k and str[k - 1] not in string.ascii_letters:
k = k - 1
i = k
while i:
if str[i - 1] not in string.ascii_letters:
break
i = i - 1
j = i
# raise RuntimeError(str[:i]+'[i]'+str[i:k]+'[k]'+str[k:])
while j < k and (str[j:k] in ns or str[j:k][:3] == 'xml'):
j = j + 1
if j == k:
# we need to find a better string
s = str[i:k]
while s in ns or s[:3] == 'xml':
s = choice(string.ascii_letters) + s[:-1]
return s
else:
return str[j:k]
class tmToRDF(RDFSink.RDFStructuredOutput):
"""Trying to do the same as above, using the TripleMaker interface
"""
def __init__(self, outFp, thisURI=None, base=None, flags=""):
RDFSink.RDFSink.__init__(self)
if outFp == None:
self._xwr = XMLWriter(dummyWrite, self)
else:
dummyEnc, dummyDec, dummyReader, encWriter = codecs.lookup('utf-8')
z = encWriter(outFp)
zw = z.write
self._xwr = XMLWriter(zw, self)
self._subj = None
self._base = base
self._formula = None # Where do we get this from? The outermost formula
if base == None: self._base = thisURI
self._thisDoc = thisURI
self._flags = flags
self._nodeID = {}
self._nextNodeID = 0
self.namedAnonID = 0
self._docOpen = 0 # Delay doc open <rdf:RDF .. till after binds
def doNothing():
pass
self._toDo = doNothing
def dummyClone(self):
"retun a version of myself which will only count occurrences"
return tmToRDF(None, self._thisDoc, base=self._base, flags=self._flags )
def start(self):
self._parts = [tm.NOTHING]
self._triples = [[None, None, None]]
self._classes = [None]
self.lists = []
self._modes = [tm.FORMULA]
self.bNodes = []
self._predIsOfs = [tm.NO]
self._pathModes = [False]
if not self._docOpen:
if getXMLVersion() != '1.0':
self._xwr.makePI('xml version="%s"' % getXMLVersion())
self._toDo()
if self.prefixes.get(RDF_NS_URI, ":::") == ":::":
if self.namespaces.get("rdf", ":::") ==":::":
self.bind("rdf", RDF_NS_URI)
# if self.prefixes.get(Logic_NS, ":::") == ":::":
# if self.namespaces.get("log", ":::") ==":::":
# self.bind("log", Logic_NS)
ats = []
ps = self.prefixes.values()
ps.sort() # Cannonicalize output somewhat
if self.defaultNamespace and "d" not in self._flags:
if "z" in self._flags:
ats.append(('xmlns',
self.referenceTo(self.defaultNamespace)))
else:
ats.append(('xmlns',self.defaultNamespace))
for pfx in ps:
nsvalue = self.namespaces[pfx]
if "z" in self._flags:
nsvalue = self.referenceTo( nsvalue)
ats.append(('xmlns:'+pfx, nsvalue))
self._xwr.startElement(RDF_NS_URI+'RDF', ats, self.prefixes)
self._nextId = 0
self._docOpen = 1
# self._subjs
# self.store.startDoc()
def end(self):
assert len(self.lists) == 0
#assert len(self.bNodes) == 0
self._closeSubject()
self._xwr.endElement()
self._docOpen = 0
self._xwr.endDocument()
def referenceTo(self, uri):
"Conditional relative URI"
if "r" in self._flags or self._base == None:
return uri
return refTo(self._base, uri)
def addNode(self, node, nameLess = 0):
if self._modes[-1] == tm.ANONYMOUS and node is not None and self._parts[-1] == tm.NOTHING:
raise ValueError('You put a dot in a bNode:' + `node`)
if self._modes[-1] == tm.FORMULA or self._modes[-1] == tm.ANONYMOUS:
self._parts[-1] = self._parts[-1] + 1
if self._parts[-1] > 3:
raise ValueError('Too many parts in statement: Try ending the statement')
if node is not None:
#print node, '+', self._triples, '++', self._parts
if self._parts[-1] == tm.PREDICATE and self._predIsOfs[-1] == tm.STALE:
self._predIsOfs[-1] = tm.NO
if self._parts[-1] == tm.SUBJECT:
subj = self._triples[-1][tm.SUBJECT]
if subj is not None and node != subj:
self._closeSubject()
elif self._parts[-1] == tm.PREDICATE:
if node == (SYMBOL, RDF_type_URI) and self._classes[-1] is None:
#special thing for
self._classes[-1] = "Wait"
else:
if self._classes[-1] is None:
self._openSubject(self._triples[-1][tm.SUBJECT])
self._classes[-1] = "Never"
#self._openPredicate(node)
else:
if self._classes[-1] == "Wait":
self._classes[-1] = node
self._openSubject(self._triples[-1][tm.SUBJECT])
else:
if node[0] == LITERAL:
self._openPredicate(self._triples[-1][tm.PREDICATE], args=(node[2],node[3]))
self._writeLiteral(node)
self._closePredicate()
elif node[0] == SYMBOL or node[0] == ANONYMOUS:
self._openPredicate(self._triples[-1][tm.PREDICATE], obj=node)
if nameLess:
node = "NameLess"
try:
self._triples[-1][self._parts[-1]] = node
except:
print self._parts, " - ", self._triples
raise
if self._modes[-1] == tm.ANONYMOUS and self._pathModes[-1] == True:
self.endStatement()
self.endAnonymous()
if self._modes[-1] == tm.LIST and nameLess == 0:
self._modes[-1] = tm.FORMULA
self.beginAnonymous()
self.lists[-1] += 1
self._modes[-1] = tm.ANONYMOUS
self.addSymbol(List_NS + "first")
self.addNode(node)
self.endStatement()
self.addNode(None)
self.addSymbol(List_NS + "rest")
self._modes[-1] = tm.LIST
def nodeIDize(self, argument):
q = argument[1]
if (q[0] == ANONYMOUS or q[0] == SYMBOL) and q[1] in self._nodeID:
#print '---', (RDF_NS_URI+' nodeID', self._nodeID[q[1]])
return (RDF_NS_URI+' nodeID', self._nodeID[q[1]])
#print '+++', (argument[0], q[1])
return (argument[0], self.referenceTo(q[1]))
def _openSubject(self, subject):
if subject != "NameLess":
subj = subject[1]
q = (self.nodeIDize((RDF_NS_URI+' about', subject)),)
else:
q = []
if self._classes[-1] is None:
self._xwr.startElement(RDF_NS_URI + 'Description',
q, self.prefixes)
self._classes[-1] = subject
else:
self._xwr.startElement(self._classes[-1][1],
q, self.prefixes)
def _closeSubject(self):
self._xwr.endElement()
self._classes[-1] = None
def _openPredicate(self, pred, args=None, obj=None, resource=None):
if obj is None:
if resource is not None:
self._xwr.startElement(pred[1], [(RDF_NS_URI+' parseType','Resource')], self.prefixes)
else:
attrs = []
if args is not None:
dt, lang = args
if dt is not None:
attrs.append((RDF_NS_URI+' datatype', dt))
if lang is not None:
attrs.append((XML_NS_URI+' lang', lang))
#print pred[1], attrs
self._xwr.startElement(pred[1], attrs, self.prefixes)
else:
#print '++', pred[1], ' ++'
self._xwr.emptyElement(pred[1], [self.nodeIDize((RDF_NS_URI+' resource', obj))], self.prefixes)
def _closePredicate(self):
self._xwr.endElement()
def _writeLiteral(self, lit):
self._xwr.data(lit[1])
def IsOf(self):
self._predIsOfs[-1] = tm.FRESH
def checkIsOf(self):
return self._predIsOfs[-1]
def forewardPath(self):
if self._modes[-1] == tm.LIST:
a = self.lists[-1].pop()
else:
a = self._triples[-1][self._parts[-1]]
self._parts[-1] = self._parts[-1] - 1
self.beginAnonymous()
self.addNode(a)
self._predIsOfs[-1] = tm.FRESH
self._pathModes[-1] = True
def backwardPath(self):
a = self._triples[-1][self._parts[-1]]
self._parts[-1] = self._parts[-1] - 1
self.beginAnonymous()
self.addNode(a)
self._pathModes[-1] = True
def endStatement(self):
if self._parts[-1] == tm.SUBJECT:
pass
elif False:
if self._parts[-1] != tm.OBJECT:
raise ValueError('try adding more to the statement' + `self._triples`)
if self._pathModes[-1]:
swap(self._triples[-1], tm.PREDICATE, tm.OBJECT)
if self._predIsOfs[-1]:
swap(self._triples[-1], tm.SUBJECT, tm.OBJECT)
subj, pred, obj = self._triples[-1]
if subj == '@this':
if pred == self.forSome:
formula.declareExistential(obj)
elif pred == self.forAll:
formula.declareUniversal(obj)
else:
raise ValueError("Internal error: unknown quntifier with '@this'")
else:
formula.add(subj, pred, obj)
self._parts[-1] = tm.NOTHING
if self._modes[-1] == tm.ANONYMOUS and self._pathModes[-1]:
self._parts[-1] = tm.SUBJECT
def addLiteral(self, lit, dt=None, lang=None):