SimplePie_Category

{
	/**
	 * Category identifier
	 *
	 * @var string|null
	 * @see get_term
	 */
	var $term;

	/**
	 * Categorization scheme identifier
	 *
	 * @var string|null
	 * @see get_scheme()
	 */
	var $scheme;

	/**
	 * Human readable label
	 *
	 * @var string|null
	 * @see get_label()
	 */
	var $label;

	/**
	 * Category type
	 * 
	 * category for <category>
	 * subject for <dc:subject>
	 *
	 * @var string|null
	 * @see get_type()
	 */
	var $type;

	/**
	 * Constructor, used to input the data
	 *
	 * @param string|null $term
	 * @param string|null $scheme
	 * @param string|null $label
	 * @param string|null $type
	 */
	public function __construct($term = null, $scheme = null, $label = null, $type = null)
	{
		$this->term = $term;
		$this->scheme = $scheme;
		$this->label = $label;
		$this->type = $type;
	}

	/**
	 * String-ified version
	 *
	 * @return string
	 */
	public function __toString()
	{
		// There is no $this->data here
		return md5(serialize($this));
	}

	/**
	 * Get the category identifier
	 *
	 * @return string|null
	 */
	public function get_term()
	{
		return $this->term;
	}

	/**
	 * Get the categorization scheme identifier
	 *
	 * @return string|null
	 */
	public function get_scheme()
	{
		return $this->scheme;
	}

	/**
	 * Get the human readable label
	 *
	 * @param bool $strict
	 * @return string|null
	 */
	public function get_label($strict = false)
	{
		if ($this->label === null && $strict !== true)
		{
			return $this->get_term();
		}
		return $this->label;
	}

	/**
	 * Get the category type
	 *
	 * @return string|null