R: Examples for 'XML::xmlAttrs'

### ** Examples

 fileName <- system.file("exampleData", "mtcars.xml", package="XML")
 doc <- xmlTreeParse(fileName)

 xmlAttrs(xmlRoot(doc))

       name  numRecords      source 
   "mtcars"        "32" "R Project"

 xmlAttrs(xmlRoot(doc)[["variables"]])

count 
 "11"

 doc <- xmlParse(fileName)
 d = xmlRoot(doc)

 xmlAttrs(d)

       name  numRecords      source 
   "mtcars"        "32" "R Project"

 xmlAttrs(d) <- c(name = "Motor Trend fuel consumption data",
                  author = "Motor Trends")
 xmlAttrs(d)

                               name                          numRecords 
"Motor Trend fuel consumption data"                                "32" 
                             source                              author 
                        "R Project"                      "Motor Trends"

   # clear all the attributes and then set new ones.
 removeAttributes(d)

<dataset>
  <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>

 xmlAttrs(d) <- c(name = "Motor Trend fuel consumption data",
                  author = "Motor Trends")


     # Show how to get the attributes with and without the prefix and
     # with and without the URLs for the namespaces.
  doc = xmlParse('<doc xmlns:r="http://www.r-project.org">
                    <el r:width="10" width="72"/>
                    <el width="46"/>
                    </doc>')

  xmlAttrs(xmlRoot(doc)[[1]], TRUE, TRUE)

r:width   width 
   "10"    "72" 
attr(,"namespaces")
http://www.r-project.org                          
                     "r"                       ""

  xmlAttrs(xmlRoot(doc)[[1]], FALSE, TRUE)

width width 
 "10"  "72" 
attr(,"namespaces")
http://www.r-project.org                          
                     "r"                       ""

  xmlAttrs(xmlRoot(doc)[[1]], TRUE, FALSE)

r:width   width 
   "10"    "72" 
attr(,"namespaces")
[1] "r" ""

  xmlAttrs(xmlRoot(doc)[[1]], FALSE, FALSE)

width width 
 "10"  "72"

Examples for 'XML::xmlAttrs'

Get the list of attributes of an XML node.