dtdIsAttribute              package:XML              R Documentation

_Q_u_e_r_y _i_f _a _n_a_m_e _i_s _a _v_a_l_i_d _a_t_t_r_i_b_u_t_e _o_f _a _D_T_D _e_l_e_m_e_n_t.

_D_e_s_c_r_i_p_t_i_o_n:

     Examines the definition of the DTD element definition identified
     by `element' to see if it supports an attribute named `name'.

_U_s_a_g_e:

     dtdIsAttribute(name, element, dtd)

_A_r_g_u_m_e_n_t_s:

    name: The name of the attribute being queried

 element: The name of the element whose definition is to be used to
          obtain the list of valid attributes.

     dtd: The DTD containing the definition of the elements,
          specifically `element'.

_D_e_t_a_i_l_s:

_V_a_l_u_e:

     A logical value indicating if the list of attributes suppported by
     the  specified element has an entry named `name'. This does
     indicate what type of value that attribute has, whether it is
     required, implied, fixed, etc.

_A_u_t_h_o_r(_s):

     Duncan Temple Lang

_R_e_f_e_r_e_n_c_e_s:

     <URL: http://www.w3.org/XML>, <URL: http://www.jclark.com/xml>,
     <URL: http://www.omegahat.org>

_S_e_e _A_l_s_o:

     `parseDTD', `dtdElement', `xmlAttrs'

_E_x_a_m_p_l_e_s:

      dtdFile <- system.file("data", "foo.dtd", pkg="XML")
      foo.dtd <- parseDTD(dtdFile)

         # true
       dtdIsAttribute("numRecords", "dataset", foo.dtd)

         # false
       dtdIsAttribute("date", "dataset", foo.dtd)

