if(SOPRANO_INCLUDE_DIR AND SOPRANO_LIBRARIES)

  # read from cache
  set(Soprano_FOUND TRUE)

else(SOPRANO_INCLUDE_DIR AND SOPRANO_LIBRARIES)

  FIND_PATH(SOPRANO_INCLUDE_DIR 
    NAMES
    soprano/soprano.h
    PATHS 
    ${KDE4_INCLUDE_DIR}
    ${INCLUDE_INSTALL_DIR}
    )

  if(MSVC)
    FIND_LIBRARY(SOPRANO_LIBRARIES_DEBUG
      NAMES
      sopranod
      PATHS
      ${KDE4_LIB_DIR}
      ${LIB_INSTALL_DIR}
    )
    FIND_LIBRARY(SOPRANO_LIBRARIES_RELEASE
      NAMES
      soprano
      PATHS
      ${KDE4_LIB_DIR}
      ${LIB_INSTALL_DIR}
    )

    if(SOPRANO_LIBRARIES_DEBUG AND SOPRANO_LIBRARIES_RELEASE)
      set(SOPRANO_LIBRARIES optimized ${SOPRANO_LIBRARIES_RELEASE}
                            debug ${SOPRANO_LIBRARIES_DEBUG})
    else(SOPRANO_LIBRARIES_DEBUG AND SOPRANO_LIBRARIES_RELEASE)
      if(SOPRANO_LIBRARIES_DEBUG)
        set(SOPRANO_LIBRARIES ${SOPRANO_LIBRARIES_DEBUG})
      else(SOPRANO_LIBRARIES_DEBUG)
        if(SOPRANO_LIBRARIES_RELEASE)
          set(SOPRANO_LIBRARIES ${SOPRANO_LIBRARIES_RELEASE})
        endif(SOPRANO_LIBRARIES_RELEASE)
      endif(SOPRANO_LIBRARIES_DEBUG)
    endif(SOPRANO_LIBRARIES_DEBUG AND SOPRANO_LIBRARIES_RELEASE)

  else(MSVC)
    FIND_LIBRARY(SOPRANO_LIBRARIES
      NAMES
      soprano
      PATHS
      ${KDE4_LIB_DIR}
      ${LIB_INSTALL_DIR}
      )
  endif(MSVC)

  if(SOPRANO_INCLUDE_DIR AND SOPRANO_LIBRARIES)
    set(Soprano_FOUND TRUE)
  endif(SOPRANO_INCLUDE_DIR AND SOPRANO_LIBRARIES)
  
  if(Soprano_FOUND)
    if(NOT Soprano_FIND_QUIETLY)
      message(STATUS "Found Soprano: ${SOPRANO_LIBRARIES}")
    endif(NOT Soprano_FIND_QUIETLY)
  else(Soprano_FOUND)
    if(Soprano_FIND_REQUIRED)
      if(NOT SOPRANO_INCLUDE_DIR)
	message(FATAL_ERROR "Could not find Soprano includes.")
      endif(NOT SOPRANO_INCLUDE_DIR)
      if(NOT SOPRANO_LIBRARIES)
	message(FATAL_ERROR "Could not find Soprano library.")
      endif(NOT SOPRANO_LIBRARIES)
    else(Soprano_FIND_REQUIRED)
      if(NOT SOPRANO_INCLUDE_DIR)
        message(STATUS "Could not find Soprano includes.")
      endif(NOT SOPRANO_INCLUDE_DIR)
      if(NOT SOPRANO_LIBRARIES)
        message(STATUS "Could not find Soprano library.")
      endif(NOT SOPRANO_LIBRARIES)
    endif(Soprano_FIND_REQUIRED)
  endif(Soprano_FOUND)

endif(SOPRANO_INCLUDE_DIR AND SOPRANO_LIBRARIES)