Parse an XML document with options controlling the parser.
xmlParseDoc.RdThis function is a generalization of xmlParse
that parses an XML document. With this function, we can specify
a combination of different options that control the operation of the
parser. The options control many different aspects the parsing process
Usage
xmlParseDoc(file, options = 1L, encoding = character(),
asText = !file.exists(file), baseURL = file)Arguments
- file
the name of the file or URL or the XML content itself
- options
options controlling the behavior of the parser. One specifies the different options as elements of an integer vector. These are then bitwised OR'ed together. The possible options are
RECOVER,NOENT,DTDLOAD,DTDATTR,DTDVALID,NOERROR,NOWARNING,PEDANTIC,NOBLANKS,SAX1,XINCLUDE,NONET,NODICT,NSCLEAN,NOCDATA,NOXINNODE,COMPACT,OLD10,NOBASEFIX,HUGE,OLDSAX. ( These options are also listed in the (non-exported) variableparserOptions.)- encoding
character string that provides the encoding of the document if it is not explicitly contained within the document itself.
- asText
a logical value indicating whether
fileis the XML content (TRUE) or the name of a file or URL (FALSE)- baseURL
the base URL used for resolving relative documents, e.g. XIncludes. This is important if
fileis the actual XML content rather than a URL
Examples
f = system.file("exampleData", "mtcars.xml", package="XML")
# Same as xmlParse()
xmlParseDoc(f)
#> <?xml version="1.0"?>
#> <!DOCTYPE dataset SYSTEM "../DatasetByRecord.dtd">
#> <!-- Taken from the R distribution, in turn taken from Henderson and Velleman 1981,
#> Building multiple regression models interactively, Biometrics 37 391-411 .
#> -->
#> <dataset name="mtcars" numRecords="32" source="R Project">
#> <variables count="11">
#> <variable unit="Miles/gallon">mpg</variable>
#> <variable>cyl</variable>
#> <variable>disp</variable>
#> <variable>hp</variable>
#> <variable>drat</variable>
#> <variable>wt</variable>
#> <variable>qsec</variable>
#> <variable>vs</variable>
#> <variable type="FactorVariable" levels="automatic,manual">am</variable>
#> <variable>gear</variable>
#> <variable>carb</variable>
#> </variables>
#> <record id="Mazda RX4"> 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4</record>
#> <record id="Mazda RX4 Wag"> 21.0 6 160.0 110 3.90 2.875 17.02 0 1 4 4</record>
#> <record id="Datsun 710"> 22.8 4 108.0 93 3.85 2.320 18.61 1 1 4 1</record>
#> <record id="Hornet 4 Drive"> 21.4 6 258.0 110 3.08 3.215 19.44 1 0 3 1</record>
#> <record id="Hornet Sportabout"> 18.7 8 360.0 175 3.15 3.440 17.02 0 0 3 2</record>
#> <record id="Valiant"> 18.1 6 225.0 105 2.76 3.460 20.22 1 0 3 1</record>
#> <record id="Duster 360"> 14.3 8 360.0 245 3.21 3.570 15.84 0 0 3 4</record>
#> <record id="Merc 240D"> 24.4 4 146.7 62 3.69 3.190 20.00 1 0 4 2</record>
#> <record id="Merc 230"> 22.8 4 140.8 95 3.92 3.150 22.90 1 0 4 2</record>
#> <record id="Merc 280"> 19.2 6 167.6 123 3.92 3.440 18.30 1 0 4 4</record>
#> <record id="Merc 280C"> 17.8 6 167.6 123 3.92 3.440 18.90 1 0 4 4</record>
#> <record id="Merc 450SE"> 16.4 8 275.8 180 3.07 4.070 17.40 0 0 3 3</record>
#> <record id="Merc 450SL"> 17.3 8 275.8 180 3.07 3.730 17.60 0 0 3 3</record>
#> <record id="Merc 450SLC"> 15.2 8 275.8 180 3.07 3.780 18.00 0 0 3 3</record>
#> <record id="Cadillac Fleetwood"> 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4</record>
#> <record id="Lincoln Continental"> 10.4 8 460.0 215 3.00 5.424 17.82 0 0 3 4</record>
#> <record id="Chrysler Imperial"> 14.7 8 440.0 230 3.23 5.345 17.42 0 0 3 4</record>
#> <record id="Fiat 128"> 32.4 4 78.7 66 4.08 2.200 19.47 1 1 4 1</record>
#> <record id="Honda Civic"> 30.4 4 75.7 52 4.93 1.615 18.52 1 1 4 2</record>
#> <record id="Toyota Corolla"> 33.9 4 71.1 65 4.22 1.835 19.90 1 1 4 1</record>
#> <record id="Toyota Corona"> 21.5 4 120.1 97 3.70 2.465 20.01 1 0 3 1</record>
#> <record id="Dodge Challenger"> 15.5 8 318.0 150 2.76 3.520 16.87 0 0 3 2</record>
#> <record id="AMC Javelin"> 15.2 8 304.0 150 3.15 3.435 17.30 0 0 3 2</record>
#> <record id="Camaro Z28"> 13.3 8 350.0 245 3.73 3.840 15.41 0 0 3 4</record>
#> <record id="Pontiac Firebird"> 19.2 8 400.0 175 3.08 3.845 17.05 0 0 3 2</record>
#> <record id="Fiat X1-9"> 27.3 4 79.0 66 4.08 1.935 18.90 1 1 4 1</record>
#> <record id="Porsche 914-2"> 26.0 4 120.3 91 4.43 2.140 16.70 0 1 5 2</record>
#> <record id="Lotus Europa"> 30.4 4 95.1 113 3.77 1.513 16.90 1 1 5 2</record>
#> <record id="Ford Pantera L"> 15.8 8 351.0 264 4.22 3.170 14.50 0 1 5 4</record>
#> <record id="Ferrari Dino"> 19.7 6 145.0 175 3.62 2.770 15.50 0 1 5 6</record>
#> <record id="Maserati Bora"> 15.0 8 301.0 335 3.54 3.570 14.60 0 1 5 8</record>
#> <record id="Volvo 142E"> 21.4 4 121.0 109 4.11 2.780 18.60 1 1 4 2</record>
#> </dataset>
#>
txt =
'<top xmlns:r="http://www.r-project.org">
<b xmlns:r="http://www.r-project.org">
<c xmlns:omg="http:/www.omegahat.net"/>
</b>
</top>'
xmlParseDoc(txt, NSCLEAN, asText = TRUE)
#> <?xml version="1.0"?>
#> <top xmlns:r="http://www.r-project.org">
#> <b>
#> <c xmlns:omg="http:/www.omegahat.net"/>
#> </b>
#> </top>
#>
txt =
'<top xmlns:r="http://www.r-project.org" xmlns:r="http://www.r-project.org">
<b xmlns:r="http://www.r-project.org">
<c xmlns:omg="http:/www.omegahat.net"/>
</b>
</top>'
xmlParseDoc(txt, c(NSCLEAN, NOERROR), asText = TRUE)
#> Error in xmlParseDoc(txt, c(NSCLEAN, NOERROR), asText = TRUE): Attribute xmlns:r redefined [42]