libsbml5-dev 5.16.0+dfsg-1 / usr / include / sbml / RateRule.h

/**
 * @file    RateRule.h
 * @brief   Definitions of RateRule.
 * @author  Ben Bornstein
 *
 * <!--------------------------------------------------------------------------
 * This file is part of libSBML.  Please visit http://sbml.org for more
 * information about SBML, and the latest version of libSBML.
 *
 * Copyright (C) 2013-2017 jointly by the following organizations:
 *     1. California Institute of Technology, Pasadena, CA, USA
 *     2. EMBL European Bioinformatics Institute (EMBL-EBI), Hinxton, UK
 *     3. University of Heidelberg, Heidelberg, Germany
 *
 * Copyright (C) 2009-2013 jointly by the following organizations: 
 *     1. California Institute of Technology, Pasadena, CA, USA
 *     2. EMBL European Bioinformatics Institute (EMBL-EBI), Hinxton, UK
 *  
 * Copyright (C) 2006-2008 by the California Institute of Technology,
 *     Pasadena, CA, USA 
 *  
 * Copyright (C) 2002-2005 jointly by the following organizations: 
 *     1. California Institute of Technology, Pasadena, CA, USA
 *     2. Japan Science and Technology Agency, Japan
 * 
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation.  A copy of the license agreement is provided
 * in the file named "LICENSE.txt" included with this software distribution
 * and also available online as http://sbml.org/software/libsbml/license.html
 * ------------------------------------------------------------------------ -->
 * 
 * @class RateRule
 * @sbmlbrief{core} An SBML <em>rate rule</em> representing <em>dx/dt = f(<b>Y</b>)</em>.
 *
 * The rule type RateRule is derived from the parent class Rule.  It is
 * used to express equations that determine the rates of change of
 * variables.  The left-hand side (the "variable" attribute) can refer to
 * the identifier of a species, compartment, or parameter (but not a
 * reaction).  The entity identified must have its "constant" attribute set
 * to @c false.  The effects of a RateRule are in general terms the same,
 * but differ in the precise details depending on which variable is being
 * set:
 * 
 * <ul> <li> <em>In the case of a species</em>, a RateRule sets the rate of
 * change of the species' quantity (<em>concentration</em> or <em>amount of
 * substance</em>) to the value determined by the formula in the "math"
 * subelement of the RateRule object.  The overall units of the formula in
 * "math" @em should (in SBML Level&nbsp;2 Version&nbsp;4 and in SBML Level&nbsp;3) or @em
 * must (in SBML releases prior to Level&nbsp;2 version&nbsp;4) be equal to
 * the unit of <em>species quantity</em> divided by the model-wide unit of
 * <em>time</em>.  <em>Restrictions</em>: There must not be both a RateRule
 * "variable" attribute and a SpeciesReference "species" attribute having
 * the same value, unless that species has its "boundaryCondition"
 * attribute is set to @c true.  This means a rate rule cannot be defined
 * for a species that is created or destroyed in a reaction, unless that
 * species is defined as a boundary condition in the model.
 *
 * <li> (For SBML Level&nbsp;3 only) <em>In the case of a species
 * reference</em>, a RateRule sets the rate of change of the stoichiometry
 * of the referenced reactant or product to the value determined by the
 * formula in "math".  The unit associated with the value produced by the
 * "math" formula should be consistent with the unit "dimensionless"
 * divided by the model-wide unit of <em>time</em>.
 *
 * <li> <em>In the case of a compartment</em>, a RateRule sets the rate of
 * change of the compartment's size to the value determined by the formula
 * in the "math" subelement of the RateRule object.  The overall units of
 * the formula @em should (in SBML Level&nbsp;2 Version&nbsp;4 and in SBML
 * Level&nbsp;3) or @em must (in SBML releases prior to Level&nbsp;2
 * version&nbsp;4) be the units of the compartment's <em>size</em> divided
 * by the model-wide unit of <em>time</em>.
 *
 * <li> <em>In the case of a parameter</em>, a RateRule sets the rate of
 * change of the parameter's value to that determined by the formula in the
 * "math" subelement of the RateRule object.  The overall units of the
 * formula @em should (in SBML Level&nbsp;2 Version&nbsp;4 and in SBML
 * Level&nbsp;3) or @em must (in SBML releases prior to Level&nbsp;2
 * version&nbsp;4) be the Parameter object's "unit" attribute value divided
 * by the model-wide unit of <em>time</em>.  
 *
 * <li> (For SBML Level&nbsp;3 Version&nbsp;2 only) <em>In the case of 
 * an object from an SBML Level&nbsp;3 package</em>, a RateRule sets the rate 
 * of change of the referenced object's value (as defined by that package) 
 * to the value of the formula in "math".  The unit of measurement associated 
 * with the value produced by the formula should be the same as that object's 
 * units attribute value (if it has such an attribute) divided by the 
 * model-wide unit of @em time, or be equal to the units of model components 
 * of that type (if objects of that class are defined by the package as having 
 * the same units) divided by the model-wide unit of @em time.
 * </ul>
 * 
 * In SBML Level&nbsp;2 and Level&nbsp;3 Version&nbsp;1, the "math" 
 * subelement of the RateRule is required.  In SBML Level&nbsp;3
 * Version&nbsp;2, this rule is relaxed, and the subelement is
 * optional.  If a RateRule with no "math" child is present in the model, 
 * the rate at which its referenced "variable" changes over time is 
 * undefined.  This may represent a situation where the model itself
 * is unfinished, or the missing information may be provided by an
 * SBML Level&nbsp;3 package.
 * 
 * If the variable attribute of a RateRule object references an object in 
 * an SBML namespace that is not understood by the interpreter reading a 
 * given SBML document (that is, if the object is defined by an SBML 
 * Level&nbsp;3 package that the software does not support), the rate rule 
 * must be ignored--the object's value will not need to be set, as the 
 * interpreter could not understand that package. If an interpreter cannot 
 * establish whether a referenced object is missing from the model or 
 * instead is defined in an SBML namespace not understood by the interpreter, 
 * it may produce a warning to the user. (The latter situation may only 
 * arise if an SBML package is present in the SBML document with a 
 * package:required attribute of "true".)
 *
 * In the context of a simulation, rate rules are in effect for simulation
 * time <em>t</em> &gt; <em>0</em>.  Please consult the relevant SBML
 * specification for additional information about the semantics of
 * assignments, rules, and entity values for simulation time <em>t</em>
 * \f$\leq\f$ <em>0</em>.
 *
 * As mentioned in the description of AssignmentRule, a model must not
 * contain more than one RateRule or AssignmentRule object having the same
 * value of "variable"; in other words, in the set of all assignment rules
 * and rate rules in an SBML model, each variable appearing in the
 * left-hand sides can only appear once.  This simply follows from the fact
 * that an indeterminate system would result if a model contained more than
 * one assignment rule for the same variable or both an assignment rule and
 * a rate rule for the same variable.
 * 
 * @copydetails doc_rules_general_summary
 */

#ifndef RateRule_h
#define RateRule_h


#include <sbml/common/extern.h>
#include <sbml/common/sbmlfwd.h>


#ifdef __cplusplus


#include <string>

#include <sbml/Rule.h>
#include <sbml/SBMLVisitor.h>

LIBSBML_CPP_NAMESPACE_BEGIN

class SBMLNamespaces;


class LIBSBML_EXTERN RateRule : public Rule
{
public:

  /**
   * Creates a new RateRule using the given SBML @p level and @p version
   * values.
   *
   * @param level an unsigned int, the SBML Level to assign to this RateRule.
   *
   * @param version an unsigned int, the SBML Version to assign to this
   * RateRule.
   *
   * @copydetails doc_throw_exception_lv
   *
   * @copydetails doc_note_setting_lv
   */
  RateRule (unsigned int level, unsigned int version);


  /**
   * Creates a new RateRule using the given SBMLNamespaces object
   * @p sbmlns.
   *
   * @copydetails doc_what_are_sbmlnamespaces 
   *
   * @param sbmlns an SBMLNamespaces object.
   *
   * @copydetails doc_throw_exception_namespace
   *
   * @copydetails doc_note_setting_lv
   */
  RateRule (SBMLNamespaces* sbmlns);


  /**
   * Destroys this RateRule.
   */
  virtual ~RateRule ();

  /**
   * Creates and returns a deep copy of this RateRule object.
   *
   * @return the (deep) copy of this RateRule object.
   */
  virtual RateRule* clone () const;


  /** @cond doxygenLibsbmlInternal */
  /**
   * Accepts the given SBMLVisitor.
   *
   * @param v the SBMLVisitor instance to be used.
   *
   * @return the result of calling <code>v.visit()</code>, which indicates
   * whether the Visitor would like to visit the next RateRule object
   * in the list of rules within which @em the present object is embedded.
   */
  virtual bool accept (SBMLVisitor& v) const;
  /** @endcond */


  /**
   * Predicate returning @c true if
   * all the required attributes for this RateRule object
   * have been set.
   *
   * In SBML Levels&nbsp;2&ndash;3, the only required attribute for a
   * RateRule object is "variable".  For Level&nbsp;1, where the equivalent
   * attribute is known by different names ("compartment", "species", or
   * "name", depending on the type of object), there is an additional
   * required attribute called "formula".
   *
   * @return @c true if the required attributes have been set, @c false
   * otherwise.
   */
  virtual bool hasRequiredAttributes() const ;


  /**
   * @copydoc doc_renamesidref_common
   */
  virtual void renameSIdRefs(const std::string& oldid, const std::string& newid);






  #ifndef SWIG



  /** @cond doxygenLibsbmlInternal */

  /**
   * Gets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to retrieve.
   *
   * @param value, the address of the value to record.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int getAttribute(const std::string& attributeName, bool& value)
    const;

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Gets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to retrieve.
   *
   * @param value, the address of the value to record.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int getAttribute(const std::string& attributeName, int& value) const;

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Gets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to retrieve.
   *
   * @param value, the address of the value to record.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int getAttribute(const std::string& attributeName,
                           double& value) const;

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Gets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to retrieve.
   *
   * @param value, the address of the value to record.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int getAttribute(const std::string& attributeName,
                           unsigned int& value) const;

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Gets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to retrieve.
   *
   * @param value, the address of the value to record.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int getAttribute(const std::string& attributeName,
                           std::string& value) const;

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Gets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to retrieve.
   *
   * @param value, the address of the value to record.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int getAttribute(const std::string& attributeName,
                           const char* value) const;

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Predicate returning @c true if this RateRule's attribute "attributeName"
   * is set.
   *
   * @param attributeName, the name of the attribute to query.
   *
   * @return @c true if this RateRule's attribute "attributeName" has been set,
   * otherwise @c false is returned.
   */
  virtual bool isSetAttribute(const std::string& attributeName) const;

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Sets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to set.
   *
   * @param value, the value of the attribute to set.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int setAttribute(const std::string& attributeName, bool value);

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Sets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to set.
   *
   * @param value, the value of the attribute to set.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int setAttribute(const std::string& attributeName, int value);

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Sets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to set.
   *
   * @param value, the value of the attribute to set.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int setAttribute(const std::string& attributeName, double value);

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Sets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to set.
   *
   * @param value, the value of the attribute to set.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int setAttribute(const std::string& attributeName,
                           unsigned int value);

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Sets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to set.
   *
   * @param value, the value of the attribute to set.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int setAttribute(const std::string& attributeName,
                           const std::string& value);

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Sets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to set.
   *
   * @param value, the value of the attribute to set.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int setAttribute(const std::string& attributeName, const char*
    value);

  /** @endcond */



  /** @cond doxygenLibsbmlInternal */

  /**
   * Unsets the value of the "attributeName" attribute of this RateRule.
   *
   * @param attributeName, the name of the attribute to query.
   *
   * @copydetails doc_returns_success_code
   * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
   * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
   */
  virtual int unsetAttribute(const std::string& attributeName);

  /** @endcond */




  #endif /* !SWIG */




protected:
  /** @cond doxygenLibsbmlInternal */
  /* the validator classes need to be friends to access the 
   * protected constructor that takes no arguments
   */
  friend class Validator;
  friend class ConsistencyValidator;
  friend class IdentifierConsistencyValidator;
  friend class InternalConsistencyValidator;
  friend class L1CompatibilityValidator;
  friend class L2v1CompatibilityValidator;
  friend class L2v2CompatibilityValidator;
  friend class L2v3CompatibilityValidator;
  friend class L2v4CompatibilityValidator;
  friend class MathMLConsistencyValidator;
  friend class ModelingPracticeValidator;
  friend class OverdeterminedValidator;
  friend class SBOConsistencyValidator;
  friend class UnitConsistencyValidator;

  /** @endcond */
};

LIBSBML_CPP_NAMESPACE_END

#endif  /* __cplusplus */


#ifndef SWIG

LIBSBML_CPP_NAMESPACE_BEGIN
BEGIN_C_DECLS

/**
 * Creates a new RateRule_t structure using the given SBML @p level and
 * @p version values.
 *
 * @param level an unsigned int, the SBML level to assign to this
 * RateRule_t structure.
 *
 * @param version an unsigned int, the SBML version to assign to this
 * RateRule_t structure.
 *
 * @returns the newly-created RateRule_t structure, or a null pointer if
 * an error occurred during construction.
 *
 * @copydetails doc_note_setting_lv
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
RateRule_t *
RateRule_create(unsigned int level, unsigned int version);


/**
 * Creates a new RateRule_t structure using the given SBMLNamespaces_t
 * structure, @p sbmlns.
 *
 * @copydetails doc_what_are_sbmlnamespaces
 *
 * @param sbmlns an SBMLNamespaces_t structure.
 *
 * @returns the newly-created RateRule_t structure, or a null pointer if
 * an error occurred during construction.
 *
 * @copydetails doc_note_setting_lv
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
RateRule_t *
RateRule_createWithNS(SBMLNamespaces_t* sbmlns);


/**
 * Frees the given RateRule_t structure.
 * 
 * @param rr the RateRule_t structure to be freed.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
void
RateRule_free(RateRule_t * rr);


/**
 * Creates a deep copy of the given RateRule_t structure.
 * 
 * @param rr the RateRule_t structure to be copied.
 *
 * @returns a (deep) copy of the given RateRule_t structure, or a null
 * pointer if a failure occurred.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
RateRule_t *
RateRule_clone(RateRule_t * rr);


/**
 * Returns the value of the "variable" attribute of the given RateRule_t
 * structure.
 *
 * @param rr the RateRule_t structure.
 *
 * @return the variable of this structure.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
const char *
RateRule_getVariable(const RateRule_t * rr);


/**
 * Gets the mathematical expression of this RateRule_t structure as an
 * ASTNode_t structure.
 *
 * @param rr the RateRule_t structure.
 *
 * @return the math for this RateRule_t, as an ASTNode_t.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
const ASTNode_t*
RateRule_getMath(const RateRule_t * rr);


/**
 * @note SBML Level 1 uses a text-string format for mathematical formulas.
 * Other levels of SBML use MathML, an XML format for representing mathematical
 * expressions.  LibSBML provides an Abstract Syntax Tree API for working
 * with mathematical expressions; this API is more powerful than working
 * with formulas directly in text form, and ASTs can be translated into
 * either MathML or the text-string syntax.  The libSBML methods that
 * accept text-string formulas directly (such as this one) are
 * provided for SBML Level 1 compatibility, but developers are encouraged
 * to use the AST mechanisms.  
 *
 * @return the formula for this RateRule_t.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
const char *
RateRule_getFormula (const RateRule_t *r);


/**
 * Predicate returning @c 1 (true) if the given RateRule_t structure's "variable"
 * is set.
 *
 * @param rr the RateRule_t structure.
 *
 * @return @c 1 (true) if the "variable" of this RateRule_t structure is
 * set, @c 0 (false) otherwise.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_isSetVariable(const RateRule_t * rr);


/**
 * Predicate returning @c 1 (true) if the given RateRule_t structure's "math"
 * is set.
 *
 * @param rr the RateRule_t structure.
 *
 * @return @c 1 (true) if the "math" of this RateRule_t structure is
 * set, @c 0 (false) otherwise.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_isSetMath(const RateRule_t * rr);


/**
 * @return @c 1 (true) if the formula (or equivalently the math) for
 * this RateRule_t is set, @c 0 (false) otherwise.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_isSetFormula (const RateRule_t *r);


/**
 * Sets the "variable" attribute of the given RateRule_t structure.
 *
 * This function copies the string given in @p variable.  If the string is
 * a null pointer, this function is equivalent to calling RateRule_unsetVariable().
 *
 * @param rr the RateRule_t structure.
 *
 * @param variable the string to which the structures "variable" attribute should be
 * set.
 *
 * @copydetails doc_returns_success_code
 * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
 * @li @sbmlconstant{LIBSBML_INVALID_ATTRIBUTE_VALUE, OperationReturnValues_t}
 * @li @sbmlconstant{LIBSBML_INVALID_OBJECT, OperationReturnValues_t}
 *
 * @note Using this function with a null pointer for @p variable is equivalent to
 * unsetting the value of the "variable" attribute.
 * 
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_setVariable(RateRule_t * rr, const char * variable);


/**
 * Sets the mathematical expression of the given RateRule_t structure.
 *
 * @param rr the RateRule_t structure.
 *
 * @param math an ASTNode_t structure to be assigned as the "math"
 * subelement of this RateRule_t.
 *
 * @copydetails doc_returns_success_code
 * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
 * @li @sbmlconstant{LIBSBML_INVALID_OBJECT, OperationReturnValues_t}
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_setMath(RateRule_t * rr, const ASTNode_t* math);


/**
 * Sets the formula of this RateRule_t to a copy of string.
 *
 * @copydetails doc_returns_success_code
 * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
 * @li @sbmlconstant{LIBSBML_INVALID_OBJECT, OperationReturnValues_t}
 *
 * @note SBML Level 1 uses a text-string format for mathematical formulas.
 * Other levels of SBML use MathML, an XML format for representing mathematical
 * expressions.  LibSBML provides an Abstract Syntax Tree API for working
 * with mathematical expressions; this API is more powerful than working
 * with formulas directly in text form, and ASTs can be translated into
 * either MathML or the text-string syntax.  The libSBML methods that
 * accept text-string formulas directly (such as this one) are
 * provided for SBML Level 1 compatibility, but developers are encouraged
 * to use the AST mechanisms.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_setFormula (RateRule_t *r, const char *formula);


/**
 * Unsets the value of the "variable" attribute of the given 
 * RateRule_t structure.
 *
 * @param ar the RateRule_t structure.
 *
 * @copydetails doc_returns_success_code
 * @li @sbmlconstant{LIBSBML_OPERATION_SUCCESS, OperationReturnValues_t}
 * @li @sbmlconstant{LIBSBML_UNEXPECTED_ATTRIBUTE, OperationReturnValues_t}
 * @li @sbmlconstant{LIBSBML_INVALID_OBJECT, OperationReturnValues_t}
 * @li @sbmlconstant{LIBSBML_OPERATION_FAILED, OperationReturnValues_t}
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_unsetVariable(RateRule_t * ar);


/**
 * Predicate returning @c 1 (true) or @c 0 (false) depending on whether all the required
 * attributes of the given RateRule_t structure have been set.
 *
 * @param rr the RateRule_t structure to check.
 *
 * @return @c 1 (true) if all the required attributes for this
 * structure have been defined, @c 0 (false) otherwise.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_hasRequiredAttributes(const RateRule_t * rr);


/**
 * Predicate returning @c 1 (true) or @c 0 (false) depending on whether all the required
 * sub-elements of the given RateRule_t structure have been set.
 *
 * @param rr the RateRule_t structure to check.
 *
 * @return @c 1 (true) if all the required sub-elements for this
 * structure have been defined, @c 0 (false) otherwise.
 *
 * @memberof RateRule_t
 */
LIBSBML_EXTERN
int
RateRule_hasRequiredElements(const RateRule_t * rr);




END_C_DECLS
LIBSBML_CPP_NAMESPACE_END

#endif  /* !SWIG  */
#endif  /* RateRule_h */