/// <summary>
        /// Evaluates this <see cref="Precondition"/> against the contents of the
        /// indicated <see cref="NodeIndex"/>.
        /// </summary>
        /// <param name="nodeIndex">The <see cref="NodeIndex"/> of a <see cref="XmlDocument"/>.</param>
        /// <param name="cache">A cache of previously evaluated precondition results.</param>
        /// <returns>A <see cref="bool"/> value indicating the applicability of this
        /// <see cref="Precondition"/> to the <see cref="XmlDocument"/>.</returns>
        public override bool Evaluate(NodeIndex nodeIndex, Dictionary<Precondition, bool> cache)
        {
            foreach (string rootElement in release.RootElements) {
                XmlNodeList list = nodeIndex.GetElementsByName (rootElement);

                if (list.Count == 1) {
                    XmlElement	fpml = list [0] as XmlElement;

                    if (fpml.LocalName.Equals("FpML"))
                        return (fpml.GetAttribute ("version").Equals (release.Version));
                    else
                        return (fpml.GetAttribute ("fpmlVersion").Equals (release.Version));
                }
            }
            return (false);
        }

        /// <summary>
        /// Evaluates this <see cref="Precondition"/> against the contents of the
        /// indicated <see cref="NodeIndex"/>.
        /// </summary>
        /// <param name="nodeIndex">The <see cref="NodeIndex"/> of a <see cref="XmlDocument"/></param>
        /// <param name="cache">A cache of previously evaluated precondition results.</param>
        /// <returns>A <see cref="bool"/> value indicating the applicability of this
        /// <see cref="Precondition"/> to the <see cref="XmlDocument"/>.</returns>
        public override bool Evaluate(NodeIndex nodeIndex, Dictionary<Precondition, bool> cache)
        {
            if (nodeIndex.HasTypeInformation) {
                string ns = FpMLRuleSet.DetermineNamespace (nodeIndex);

                foreach (string type in types) {
                    XmlNodeList list = nodeIndex.GetElementsByType (ns, type);

                    if ((list != null) && (list.Count > 0)) return (true);
                }
            }
            else {
                foreach (String element in elements) {
                    XmlNodeList list = nodeIndex.GetElementsByName (element);

                    if ((list != null) && (list.Count > 0)) return (true);
                }
            }
            return (false);
        }

        private static bool Rule02(string name, NodeIndex nodeIndex, XmlNodeList list, ValidationErrorHandler errorHandler)
        {
            bool		result 	= true;

            foreach (XmlElement context in list) {
                XmlElement	    startDate	= XPath.Path (context, "novation", "firstPeriodStartDate");
                XmlAttribute	href;

                if ((startDate == null) || (href = startDate.GetAttributeNode ("href"))== null) continue;

                XmlElement		target	= nodeIndex.GetElementById (href.Value);

                if ((target == null) || !target.LocalName.Equals("party")) {
                    errorHandler ("305", context,
                        "The @href attribute on the firstPeriodStartDate must reference a party",
                        name, href.Value);

                    result = false;
                }
            }
            return (result);
        }

 internal bool PerformValidation(NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
 {
     return (Validate (nodeIndex, errorHandler));
 }

 /// <summary>
 /// Determines if the <b>Rule</b> applies to a document but evaluating
 /// its <see cref="Precondition"/>.
 /// </summary>
 /// <param name="nodeIndex">The <see cref="NodeIndex"/> of the document.</param>
 /// <returns><c>true</c> if the <b>Rule</b> applies, <c>false</c> otherwise.</returns>
 public bool AppliesTo(NodeIndex nodeIndex)
 {
     return (precondition.Evaluate (nodeIndex, new Dictionary<Precondition,bool> ()));
 }

        // --------------------------------------------------------------------
        private static bool Rule01(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            if (nodeIndex.HasTypeInformation)
                return (Rule01 (name, nodeIndex, nodeIndex.GetElementsByType (DetermineNamespace (nodeIndex), "PricingDataPointCoordinate"), errorHandler));

            return (Rule01 (name, nodeIndex, nodeIndex.GetElementsByName ("coordinate"), errorHandler));
        }

        // --------------------------------------------------------------------
        private static bool Rule02(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            if (nodeIndex.HasTypeInformation)
                return (Rule02 (name, nodeIndex, nodeIndex.GetElementsByType (DetermineNamespace (nodeIndex), "PaymentCalculationPeriod"), errorHandler));

            return (Rule02 (name, nodeIndex, nodeIndex.GetElementsByName ("paymentCalculationPeriod"), errorHandler));
        }

        // --------------------------------------------------------------------
        private static bool Rule14(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            bool			result	= true;

            foreach (XmlElement context in nodeIndex.GetElementsByName ("creditDefaultSwap")) {
                foreach (XmlElement seller in XPath.Paths (context, "protectionTerms", "creditEvents", "creditEventNotice", "notifyingParty", "sellerPartyReference")) {
                    if (Equal (seller.GetAttribute ("href"),
                            XPath.Path (context, "generalTerms", "sellerPartyReference").GetAttribute ("href")))
                        continue;

                    errorHandler ("305", context,
                        "If protectionTerms/creditEvents/creditEventNotice/notifyingParty/sellerPartyReference " +
                        "is present, its @href attribute must match that of generalTerms/sellerPartyReference",
                        name, null);

                    result = false;
                }
            }
            return (result);
        }

        // --------------------------------------------------------------------
        private static bool Rule12(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            bool			result	= true;

            foreach (XmlElement context in nodeIndex.GetElementsByName ("referenceInformation")) {
                if (Exists (context ["referencePrice"])) {
                    if (GreaterOrEqual (context ["referencePrice"], 0.0))
                        continue;

                    errorHandler ("305", context,
                        "If referencePrice is present it must not have a negative " +
                        "value",
                        name, context ["referencePrice"].InnerText);

                    result = false;
                }
            }
            return (result);
        }

 // --------------------------------------------------------------------
 private static bool Rule37(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
 {
     return (Rule37 (name, nodeIndex.GetElementsByName ("cashSettlementTerms"), errorHandler));
 }

 // --------------------------------------------------------------------
 private static bool Rule36(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
 {
     return (Rule36 (name, XPath.Paths (nodeIndex.GetElementsByName ("creditEvents"), "creditEventNotice", "publiclyAvailableInformation"), errorHandler));
 }

 // --------------------------------------------------------------------
 private static bool Rule35(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
 {
     return (Rule35 (name, nodeIndex.GetElementsByName ("creditEvents"), errorHandler));
 }

 // --------------------------------------------------------------------
 private static bool Rule34(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
 {
     return (Rule34 (name, nodeIndex.GetElementsByName ("deliverableObligations"), errorHandler));
 }

 // --------------------------------------------------------------------
 private static bool Rule33(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
 {
     return (Rule33 (name, nodeIndex.GetElementsByName ("periodicPayment"), errorHandler));
 }

        // --------------------------------------------------------------------
        private static bool Rule30(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            bool		result = true;

            foreach (XmlElement context in nodeIndex.GetElementsByName ("creditDefaultSwap")) {
                XmlElement	paymentDate;
                XmlElement	terminationDate;

                if (And (
                    Exists (paymentDate = XPath.Path (context, "feeLeg", "periodicPayment", "lastRegularPaymentDate")),
                    Exists (terminationDate = XPath.Path (context, "generalTerms", "scheduledTerminationDate", "adjustableDate", "unadjustedDate")))) {
                    if (Less (paymentDate, terminationDate)) continue;

                    errorHandler ("305", context,
                        "Last regular periodic payment date '" + paymentDate.InnerText + "' " +
                        "must be before the termination date '" + terminationDate.InnerText + "'",
                        name, null);

                    result = false;
                }
            }
            return (result);
        }

        // --------------------------------------------------------------------
        private static bool Rule10(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            bool			result	= true;

            foreach (XmlElement context in nodeIndex.GetElementsByName ("referenceInformation")) {
                string			primaryReference;
                string			primaryId;

                foreach (XmlElement primary in XPath.Paths (context, "referenceObligation", "guarantorReference")) {
                    if (Equal (
                            primaryReference = primary.GetAttribute ("href"),
                            primaryId		 = context ["referenceEntity"].GetAttribute ("id")))
                        continue;

                    errorHandler ("305", context,
                        "Primary obligor reference '" + primaryReference +
                        "' should point to the reference entity ' " + primaryId + "'",
                        name, null);

                    result = false;
                }
            }
            return (result);
        }

        // --------------------------------------------------------------------
        private static bool Rule11(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            bool			result	= true;

            foreach (XmlElement trade in nodeIndex.GetElementsByName ("trade")) {
                if (IsIsda2003 (trade) && IsLongForm (trade)) {
                    XmlElement	context = XPath.Path (trade, "creditDefaultSwap", "generalTerms", "referenceInformation") as XmlElement;

                    if (Exists (XPath.Path (context, "allGuarantees"))) continue;

                    errorHandler ("305", context,
                        "allGuarantees element missing in protection terms",
                        name, null);

                    result = false;
                }
            }
            return (result);
        }

        // --------------------------------------------------------------------
        private static bool Rule41(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            bool		result 	= true;

            foreach (XmlElement context in nodeIndex.GetElementsByName ("generalTerms")) {
                XmlElement		tranche		= XPath.Path (context, "indexReferenceInformation", "tranche");
                XmlElement		delivery	= XPath.Path (context, "modifiedEquityDelivery");

                if ((tranche == null) && (delivery != null)) {
                    errorHandler ("305", context,
                        "If indexReferenceInformation/tranche is not present then modifiedEquityDelivery must not be present.",
                        name, null);

                    result = false;
                }
            }
            return (result);
        }

        // --------------------------------------------------------------------
        private static bool Rule13(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            bool			result	= true;

            foreach (XmlElement context in nodeIndex.GetElementsByName ("creditDefaultSwap")) {
                foreach (XmlElement buyer in XPath.Paths (context, "protectionTerms", "creditEvents", "creditEventNotice", "notifyingParty", "buyerPartyReference")) {
                    string		buyerName;
                    string		referenceName;

                    if (Equal (
                            buyerName = buyer.GetAttribute ("href"),
                            referenceName = XPath.Path (context, "generalTerms", "buyerPartyReference").GetAttribute ("href")))
                        continue;

                    errorHandler ("305", context,
                        "Credit event notice references buyer party reference " + buyerName +
                        " but general terms references " + referenceName,
                        name, null);

                    result = false;
                }
            }
            return (result);
        }

        // --------------------------------------------------------------------
        private static bool Rule42(string name, NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
        {
            bool		result 	= true;

            foreach (XmlElement context in nodeIndex.GetElementsByName ("generalTerms")) {
                XmlElement	basket			= XPath.Path (context, "basketReferenceInformation");
                XmlElement	substitution	= XPath.Path (context, "substitution");

                if ((basket == null) && (substitution != null)) {
                    errorHandler ("305", context,
                        "If basketReferenceInformation is not present then substitution must not be present.",
                        name, null);

                    result = false;
                }
            }
            return (result);
        }