1

ここで気が狂いそうです。

xpathApply を使用して usaspending.gov からダウンロードした XML データを R にインポートしようとしています。現在、DateSigned 属性を分離しようとしています。xpath 構文は正しいように感じますが、空白のリストを描画しています。何かご意見は？

require(XML)

file1 <- "FY12.xml"

download.file("http://usaspending.gov/fpds/fpds.php?detail=b&fiscal_year=2012&maj_agency_cat=97&max_records=10", file1, method="auto")

doc <- xmlTreeParse(file1, useInternalNode = TRUE)
top <- xmlRoot(doc)
test <- xpathApply(top, "/usaspendingSearchResults/result/doc/DateSigned", xmlValue)

XMLコードを追加するために編集:

<?xml version="1.0" encoding="utf-8"?>
<usaspendingSearchResults xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://usaspending.gov/schemas/" xsi:noNamespaceSchemaLocation="http://usaspending.gov/schemas/PrimeBasicContracts.xsd">
  <search_criteria>
    <search_criterion field="fiscal_year" value="2012"/>
    <search_criterion field="maj_contracting_agency" value="97*"/>
    <search_criterion field="Contracts" value="c"/>
    <search_criterion field="sortby" value="DOLLARS_OBLIGATED desc"/>
    <search_criterion field="records_from" value="0"/>
    <search_criterion field="max_records" value="10"/>
  </search_criteria>
  <result numFound="1463044" max_records="10">
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Firm Fixed Price</ContractPricing>
      <ContractingAgency>DEPT OF THE AIR FORCE</ContractingAgency>
      <DUNSNumber>149879157</DUNSNumber>
      <parentDUNSNumber>009256819</parentDUNSNumber>
      <DateSigned>2012-03-08T05:00:00Z</DateSigned>
      <ContractDescription>RSAF F-15 FLEET MODERNIZATION PROGRAM</ContractDescription>
      <ReasonForModification/>
      <DollarsObligated>3373879999.98</DollarsObligated>
      <ExtentCompeted>NOT AVAILABLE FOR COMPETITION</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>14</TransactionNumber>
      <FundingAgency>5700</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>5700</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>0</ModificationNumber>
      <PSCCategoryCode>1510</PSCCategoryCode>
      <ParentRecipientOrCompanyName>THE BOEING COMPANY</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>MO01</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>MISSOURI</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>631341939</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336411</PrincipalNAICSCode>
      <ProcurementInstrumentID>FA863412C2651</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>1510</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>8242</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>97</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>6200 JS MCDONNELL BLVD, , </RecipientAddressLine123>
      <RecipientCity>SAINT LOUIS</RecipientCity>
      <RecipientCongressionalDistrict>MO01</RecipientCongressionalDistrict>
      <RecipientCountyName>SAINT LOUIS</RecipientCountyName>
      <RecipientName>BOEING COMPANY, THE</RecipientName>
      <RecipientOrContractorName>BOEING COMPANY, THE</RecipientOrContractorName>
      <RecipientState>MO</RecipientState>
      <RecipientZipCode>631341939</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Combination (two or more)</ContractPricing>
      <ContractingAgency>DEPT OF THE NAVY</ContractingAgency>
      <DUNSNumber>963737366</DUNSNumber>
      <parentDUNSNumber>001381284</parentDUNSNumber>
      <DateSigned>2012-01-31T05:00:00Z</DateSigned>
      <ContractDescription>CONSTRUCTION OF SSN 784 (FY 09)</ContractDescription>
      <ReasonForModification>FUNDING ONLY ACTION</ReasonForModification>
      <DollarsObligated>2712135779.00</DollarsObligated>
      <ExtentCompeted>NOT COMPETED</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>0</TransactionNumber>
      <FundingAgency>1700</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>1700</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>P00022</ModificationNumber>
      <PSCCategoryCode>1904</PSCCategoryCode>
      <ParentRecipientOrCompanyName>GENERAL DYNAMICS CORPORATION</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>CT02</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>CONNECTICUT</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>063404909</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336611</PrincipalNAICSCode>
      <ProcurementInstrumentID>N0002409C2104</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>1904</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>1611</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>17</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>75 EASTERN POINT RD, , </RecipientAddressLine123>
      <RecipientCity>GROTON</RecipientCity>
      <RecipientCongressionalDistrict>CT02</RecipientCongressionalDistrict>
      <RecipientCountyName>NEW LONDON</RecipientCountyName>
      <RecipientName>ELECTRIC BOAT CORPORATION</RecipientName>
      <RecipientOrContractorName>ELECTRIC BOAT CORPORATION</RecipientOrContractorName>
      <RecipientState>CT</RecipientState>
      <RecipientZipCode>063404905</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Cost Plus Fixed Fee</ContractPricing>
      <ContractingAgency>DEPT OF THE NAVY</ContractingAgency>
      <DUNSNumber>830135799</DUNSNumber>
      <parentDUNSNumber>967362331</parentDUNSNumber>
      <DateSigned>2012-05-31T04:00:00Z</DateSigned>
      <ContractDescription>AWARD OF LHA 7 DETAIL DESIGN AND CONSTRUCTION.</ContractDescription>
      <ReasonForModification>ADDITIONAL WORK (NEW AGREEMENT,FAR PART 6 APPLIES)</ReasonForModification>
      <DollarsObligated>2156714483.00</DollarsObligated>
      <ExtentCompeted>NOT COMPETED</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>0</TransactionNumber>
      <FundingAgency>1700</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>1700</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>P00016</ModificationNumber>
      <PSCCategoryCode>1911</PSCCategoryCode>
      <ParentRecipientOrCompanyName>Huntington Ingalls Industries  Inc.</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>MS04</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>MISSISSIPPI</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>395680149</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336611</PrincipalNAICSCode>
      <ProcurementInstrumentID>N0002410C2229</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>1911</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>1611</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>17</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>1000 ACCESS RD, , </RecipientAddressLine123>
      <RecipientCity>PASCAGOULA</RecipientCity>
      <RecipientCongressionalDistrict>MS00</RecipientCongressionalDistrict>
      <RecipientCountyName>JACKSON</RecipientCountyName>
      <RecipientName>NORTHROP GRUMMAN SHIPBUILDING, INC.</RecipientName>
      <RecipientOrContractorName>NORTHROP GRUMMAN SHIPBUILDING, INC.</RecipientOrContractorName>
      <RecipientState>MS</RecipientState>
      <RecipientZipCode>395670149</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Firm Fixed Price</ContractPricing>
      <ContractingAgency>DEPT OF THE AIR FORCE</ContractingAgency>
      <DUNSNumber>832963495</DUNSNumber>
      <parentDUNSNumber>009256819</parentDUNSNumber>
      <DateSigned>2012-06-22T04:00:00Z</DateSigned>
      <ContractDescription>F-15 S/SA CONVERSION&amp;PROVISIOING</ContractDescription>
      <ReasonForModification/>
      <DollarsObligated>1828165500.00</DollarsObligated>
      <ExtentCompeted>NOT AVAILABLE FOR COMPETITION</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>6</TransactionNumber>
      <FundingAgency>5700</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>5700</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>0</ModificationNumber>
      <PSCCategoryCode>J016</PSCCategoryCode>
      <ParentRecipientOrCompanyName>THE BOEING COMPANY</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>MO01</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>MISSOURI</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>631341939</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336413</PrincipalNAICSCode>
      <ProcurementInstrumentID>FA850512C0001</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>J016</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>8242</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>97</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>6200 J S MCDONNELL BLVD, , </RecipientAddressLine123>
      <RecipientCity>SAINT LOUIS</RecipientCity>
      <RecipientCongressionalDistrict>MO01</RecipientCongressionalDistrict>
      <RecipientCountyName>SAINT LOUIS</RecipientCountyName>
      <RecipientName>BOEING COMPANY, THE</RecipientName>
      <RecipientOrContractorName>BOEING COMPANY, THE</RecipientOrContractorName>
      <RecipientState>MO</RecipientState>
      <RecipientZipCode>631341939</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Fixed Price Incentive</ContractPricing>
      <ContractingAgency>DEPT OF THE NAVY</ContractingAgency>
      <DUNSNumber>106632750</DUNSNumber>
      <parentDUNSNumber>106632750</parentDUNSNumber>
      <DateSigned>2011-11-23T05:00:00Z</DateSigned>
      <ContractDescription>LOT 16 MV FULL FUNDING</ContractDescription>
      <ReasonForModification>FUNDING ONLY ACTION</ReasonForModification>
      <DollarsObligated>1681280764.36</DollarsObligated>
      <ExtentCompeted>NOT COMPETED</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>0</TransactionNumber>
      <FundingAgency>1700</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>1700</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>P00173</ModificationNumber>
      <PSCCategoryCode>1520</PSCCategoryCode>
      <ParentRecipientOrCompanyName>BELL BOEING JOINT PROJECT OFFICE</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>TX13</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>TEXAS</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>791111200</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336411</PrincipalNAICSCode>
      <ProcurementInstrumentID>N0001907C0001</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>1520</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>1506</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>17</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>401 TILTROTOR DR, , </RecipientAddressLine123>
      <RecipientCity>AMARILLO</RecipientCity>
      <RecipientCongressionalDistrict>TX13</RecipientCongressionalDistrict>
      <RecipientCountyName>POTTER</RecipientCountyName>
      <RecipientName>BELL BOEING JOINT PROJECT OFFICE</RecipientName>
      <RecipientOrContractorName>BELL BOEING JOINT PROJECT OFFICE</RecipientOrContractorName>
      <RecipientState>TX</RecipientState>
      <RecipientZipCode>791111200</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Firm Fixed Price</ContractPricing>
      <ContractingAgency>DEPT OF THE NAVY</ContractingAgency>
      <DUNSNumber>039267141</DUNSNumber>
      <parentDUNSNumber>009256819</parentDUNSNumber>
      <DateSigned>2012-09-21T04:00:00Z</DateSigned>
      <ContractDescription>DEFINITIZE P-8A LRIP III AIRCRAFT</ContractDescription>
      <ReasonForModification>OTHER ADMINISTRATIVE ACTION</ReasonForModification>
      <DollarsObligated>1600492644.00</DollarsObligated>
      <ExtentCompeted>NOT COMPETED</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>0</TransactionNumber>
      <FundingAgency>1700</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>1700</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>P00045</ModificationNumber>
      <PSCCategoryCode>1560</PSCCategoryCode>
      <ParentRecipientOrCompanyName>THE BOEING COMPANY</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>WA09</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>WASHINGTON</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>980322316</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336411</PrincipalNAICSCode>
      <ProcurementInstrumentID>N0001909C0022</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>1560</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>1506</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>17</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>20403 68TH AVE S MS 8K-10, , </RecipientAddressLine123>
      <RecipientCity>KENT</RecipientCity>
      <RecipientCongressionalDistrict>WA09</RecipientCongressionalDistrict>
      <RecipientCountyName>KING</RecipientCountyName>
      <RecipientName>THE BOEING COMPANY</RecipientName>
      <RecipientOrContractorName>THE BOEING COMPANY</RecipientOrContractorName>
      <RecipientState>WA</RecipientState>
      <RecipientZipCode>980322316</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Fixed Price Incentive</ContractPricing>
      <ContractingAgency>DEPT OF THE NAVY</ContractingAgency>
      <DUNSNumber>008016958</DUNSNumber>
      <parentDUNSNumber>834951691</parentDUNSNumber>
      <DateSigned>2011-12-09T05:00:00Z</DateSigned>
      <ContractDescription>AUTHORIZE EFFORTS ASSOCIATED WITH LRIP 5 PRODUCTION UNDEFINITIEZED CONTRACT ACTION (UCA)</ContractDescription>
      <ReasonForModification>ADDITIONAL WORK (NEW AGREEMENT,FAR PART 6 APPLIES)</ReasonForModification>
      <DollarsObligated>1592408644.00</DollarsObligated>
      <ExtentCompeted>NOT COMPETED</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>0</TransactionNumber>
      <FundingAgency>1700</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>1700</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>P00014</ModificationNumber>
      <PSCCategoryCode>1510</PSCCategoryCode>
      <ParentRecipientOrCompanyName>LOCKHEED MARTIN CORPORATION</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>TX12</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>TEXAS</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>761017450</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336411</PrincipalNAICSCode>
      <ProcurementInstrumentID>N0001910C0002</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>1510</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>3010</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>57</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>LOCKHEED BLVD, , </RecipientAddressLine123>
      <RecipientCity>FORT WORTH</RecipientCity>
      <RecipientCongressionalDistrict>TX00</RecipientCongressionalDistrict>
      <RecipientCountyName>TARRANT</RecipientCountyName>
      <RecipientName>LOCKHEED MARTIN CORPORATION</RecipientName>
      <RecipientOrContractorName>LOCKHEED MARTIN CORPORATION</RecipientOrContractorName>
      <RecipientState>TX</RecipientState>
      <RecipientZipCode>761087450</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Firm Fixed Price</ContractPricing>
      <ContractingAgency>DEPT OF THE ARMY</ContractingAgency>
      <DUNSNumber>835551474</DUNSNumber>
      <parentDUNSNumber>001344142</parentDUNSNumber>
      <DateSigned>2012-06-06T04:00:00Z</DateSigned>
      <ContractDescription>MULTI SERVICE, 5 YR, MULTI-YR CONTRACT FOR H-60 HELICOPTERS.  FY2012 ¿ FY2016 PRODUCTION CONTRACT FOR ARMY/NAVY/FMS UH/HH/MH-60 HELICOPTERS TO INCLUDE PROCUREMENT OF UP TO 916 EACH AIRCRAFT AND RELATED SUPPORT, SERVICES, SYSTEMS/PROJECT MANAGEMENT, PUBLICATIONS, AND TECHNICAL DATA.  FMS COUNTRIES INCLUDE SAUDI ARABIAN NATIONAL GUARD (SANG), TAIWAN, THAILAND AND ROYAL AUSTRALIAN NAVY (RAN).</ContractDescription>
      <ReasonForModification/>
      <DollarsObligated>1543229958.00</DollarsObligated>
      <ExtentCompeted>NOT COMPETED</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>1</TransactionNumber>
      <FundingAgency>2100</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>2100</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>0</ModificationNumber>
      <PSCCategoryCode>1520</PSCCategoryCode>
      <ParentRecipientOrCompanyName>UNITED TECHNOLOGIES CORPORATION</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>CT03</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>CONNECTICUT</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>066141385</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336411</PrincipalNAICSCode>
      <ProcurementInstrumentID>W58RGZ12C0008</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>1520</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>2031</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>21</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>6900 MAIN ST, , </RecipientAddressLine123>
      <RecipientCity>STRATFORD</RecipientCity>
      <RecipientCongressionalDistrict>CT03</RecipientCongressionalDistrict>
      <RecipientCountyName>FAIRFIELD</RecipientCountyName>
      <RecipientName>SIKORSKY AIRCRAFT CORPORATION</RecipientName>
      <RecipientOrContractorName>SIKORSKY AIRCRAFT CORPORATION</RecipientOrContractorName>
      <RecipientState>CT</RecipientState>
      <RecipientZipCode>066141385</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Delivery Order</AwardType>
      <ContractPricing>Fixed Price with Economic Price Adjustment</ContractPricing>
      <ContractingAgency>DEFENSE LOGISTICS AGENCY</ContractingAgency>
      <DUNSNumber>004294737</DUNSNumber>
      <parentDUNSNumber>423792808</parentDUNSNumber>
      <DateSigned>2012-09-20T04:00:00Z</DateSigned>
      <ContractDescription>AWARD JP5 
CLIN 0101 FOR 82,349,000 FOB ORIGIN DEER PARK, TX BY TANKER
CLIN 0201 FOR 212,860,000 FOB ORIGIN DEER PARK, TX BY PIPELINE

AWARD JP8
CLIN 0301 FOR 118,701,000 FOB ORIGIN DEER PARK, TX BY PIPELINE</ContractDescription>
      <ReasonForModification/>
      <DollarsObligated>1358320745.62</DollarsObligated>
      <ExtentCompeted>FULL AND OPEN COMPETITION</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>0</TransactionNumber>
      <FundingAgency>97AS</FundingAgency>
      <IDVProcurementInstrumentID>SP060012D0510</IDVProcurementInstrumentID>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>97AS</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>0</ModificationNumber>
      <PSCCategoryCode>9130</PSCCategoryCode>
      <ParentRecipientOrCompanyName>ROYAL DUTCH SHELL PLC</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>TX18</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>TEXAS</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>770024916</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>324110</PrincipalNAICSCode>
      <ProcurementInstrumentID>B001</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>9130</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>4930</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>97</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>910 LOUISIANA ST STE 2, , </RecipientAddressLine123>
      <RecipientCity>HOUSTON</RecipientCity>
      <RecipientCongressionalDistrict>TX18</RecipientCongressionalDistrict>
      <RecipientCountyName>HARRIS</RecipientCountyName>
      <RecipientName>EQUILON ENTERPRISES LLC</RecipientName>
      <RecipientOrContractorName>EQUILON ENTERPRISES LLC</RecipientOrContractorName>
      <RecipientState>TX</RecipientState>
      <RecipientZipCode>770024916</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Delivery Order</TypeofTransaction>
    </doc>
    <doc spendingCategory="Contracts">
      <record_count/>
      <AwardType>Definitive Contract</AwardType>
      <ContractPricing>Firm Fixed Price</ContractPricing>
      <ContractingAgency>DEPT OF THE ARMY</ContractingAgency>
      <DUNSNumber>835551474</DUNSNumber>
      <parentDUNSNumber>001344142</parentDUNSNumber>
      <DateSigned>2012-06-06T04:00:00Z</DateSigned>
      <ContractDescription>MULTI SERVICE, 5 YR, MULTI-YR CONTRACT FOR H-60 HELICOPTERS.  FY2012 ¿ FY2016 PRODUCTION CONTRACT FOR ARMY/NAVY/FMS UH/HH/MH-60 HELICOPTERS TO INCLUDE PROCUREMENT OF UP TO 916 EACH AIRCRAFT AND RELATED SUPPORT, SERVICES, SYSTEMS/PROJECT MANAGEMENT, PUBLICATIONS, AND TECHNICAL DATA.  FMS COUNTRIES INCLUDE SAUDI ARABIAN NATIONAL GUARD (SANG), TAIWAN, THAILAND AND ROYAL AUSTRALIAN NAVY (RAN).</ContractDescription>
      <ReasonForModification/>
      <DollarsObligated>1284346737.00</DollarsObligated>
      <ExtentCompeted>NOT COMPETED</ExtentCompeted>
      <FiscalYear>2012</FiscalYear>
      <TransactionNumber>2</TransactionNumber>
      <FundingAgency>2100</FundingAgency>
      <IDVProcurementInstrumentID/>
      <MajorAgency>9700</MajorAgency>
      <ContractingAgencyCode>2100</ContractingAgencyCode>
      <MajorFundingAgency>9700</MajorFundingAgency>
      <ModificationNumber>0</ModificationNumber>
      <PSCCategoryCode>1520</PSCCategoryCode>
      <ParentRecipientOrCompanyName>UNITED TECHNOLOGIES CORPORATION</ParentRecipientOrCompanyName>
      <PlaceofPerformanceCongDistrict>CT03</PlaceofPerformanceCongDistrict>
      <PlaceofPerformanceState>CONNECTICUT</PlaceofPerformanceState>
      <PlaceofPerformanceZipCode>066141385</PlaceofPerformanceZipCode>
      <PrincipalNAICSCode>336411</PrincipalNAICSCode>
      <ProcurementInstrumentID>W58RGZ12C0008</ProcurementInstrumentID>
      <PrincipalPlaceCountyOrCity/>
      <ProductorServiceCode>1520</ProductorServiceCode>
      <ProgramSource/>
      <ProgramSourceAccountCode>8242</ProgramSourceAccountCode>
      <ProgramSourceAgencyCode>11</ProgramSourceAgencyCode>
      <ProgramSourceDescription/>
      <RecipientAddressLine123>6900 MAIN ST, , </RecipientAddressLine123>
      <RecipientCity>STRATFORD</RecipientCity>
      <RecipientCongressionalDistrict>CT03</RecipientCongressionalDistrict>
      <RecipientCountyName>FAIRFIELD</RecipientCountyName>
      <RecipientName>SIKORSKY AIRCRAFT CORPORATION</RecipientName>
      <RecipientOrContractorName>SIKORSKY AIRCRAFT CORPORATION</RecipientOrContractorName>
      <RecipientState>CT</RecipientState>
      <RecipientZipCode>066141385</RecipientZipCode>
      <TypeofSpending>c</TypeofSpending>
      <TypeofTransaction>Definitive Contract</TypeofTransaction>
    </doc>
  </result>
</usaspendingSearchResults>
4

3 に答える 3

3 
require(XML)
require(RCurl)
rURL <- "http://usaspending.gov/fpds/fpds.php?detail=b&fiscal_year=2012&maj_agency_cat=97&max_records=10"
rData <- getURL(rURL, useragent = 'mozilla', followlocation = TRUE)
xData <- xmlParse(rData)

観察

> xmlNamespaceDefinitions(xData ,simplify = TRUE)
                                        xsi 
"http://www.w3.org/2001/XMLSchema-instance" 

          "http://usaspending.gov/schemas/" 
attr(,"class")
[1] "SimplifiedXMLNamespaceDefinitions" "XMLNamespaceDefinitions"

したがって、複数の名前空間定義があります。どちらを使用するかを R に指示する

test <- xpathApply(xData, "//def:DateSigned"
                        , namespaces = c(def = "http://usaspending.gov/schemas/"))


> test
[[1]]
<DateSigned>2012-03-08T05:00:00Z</DateSigned> 

[[2]]
<DateSigned>2012-01-31T05:00:00Z</DateSigned> 

[[3]]
<DateSigned>2012-05-31T04:00:00Z</DateSigned> 

[[4]]
<DateSigned>2012-06-22T04:00:00Z</DateSigned>

R の XML ライブラリを使用して xpath クエリを使用するにはどうすればよいですか? を参照してください。詳細については。

「?xpathApply」から

XML ドキュメントのノードで名前空間が定義されている場合、XPath 式は、XML ドキュメント/ノードのデフォルトの名前空間であっても、名前空間を使用する必要があります。たとえば、XML ドキュメント '...' があるとします。すべてのトピック ノードを見つけるには、XPath 式 '"/help/topic"' を使用するとよいでしょう。ただし、URI '<a href="http://www.r-project.org/Rd" rel="nofollow noreferrer">http://www.r- に関連付けられている明示的な名前空間プレフィックスを使用する必要があります。 project.org/Rd' は、XML ドキュメント内のものに対応します。したがって、「getNodeSet(doc, "/r:help/r:topic", c(r = " http://www.r-project.org/Rd "))」を使用します。

于 2013-06-18T04:34:34.517 に答える
1

別の方法は次のとおりです。

test = getNodeSet(doc, "//*[local-name() = 'DateSigned']")
于 2013-06-18T12:01:52.400 に答える
0

XML に対して XPath をテストするために使用できるオンライン ツールは多数あります。

最初のものには、最も一般的なケースに関する最小限の 1 行の説明さえあります。おそらくこれらはあなたを助けることができます。それは些細な名前空間マッピングの問題である可能性があります。それ以外の場合、XPath は問題ないように見えます。

于 2013-06-18T01:01:27.287 に答える