current_voltage_relation 

The specification of how the current flow etc. into the cell relates to the membrane potential 
difference (e.g. Ohmic relationship)

Element Information

Model

ohmic{0,1} , integrate_and_fire{0,1} , conc_dependence{0,1} , conc_factor{0,1} , q10_settings* , offset{0,1} , gate*
Children: conc_dependence, conc_factor, gate, integrate_and_fire, offset, ohmic, q10_settings

Attributes

QName Type Fixed Default Use Inheritable Annotation
charge xs:positiveInteger optional 
Electrical charge of the ion in question
cond_law ConductanceLaw optional 
Introduced in v1.7.3 for new format ChannelML. Specifies which type of conductance law to use: ohmic, etc.
default_erev VoltageValue optional 
Most implementations of these channel mechanisms (e.g. a mod file) will need a value for the
reversal potential for the ion which flows through the channel. However, this is a property of the cell, as opposed to the channel.
For convenience though, a typical value can be used here, so a pretty self contained script can be produced, but when used in a real cell the
actual value for erev must be calculated
default_gmax ConductanceDensityValue optional 
Introduced in v1.7.3 for new format ChannelML. Maximum conductance density of channel. Note this will normally be reset when the channel mechanism is placed on a cell, but it it 
useful to have a default value here.
fixed_erev YesNo no optional 
Flags whether the reversal potential can be influenced from outside the channel (value = no; default)
as is normally the case (e.g. a Ca channel whose reversal potential is influenced by a decaying calcium pool), or 
whether the rev pot remains fixed (just for this channel) at default_erev (value = yes)
ion xs:string optional 
Introduced in v1.7.3 for new format ChannelML. The ion which will flow due to the conductance. Note this should be already declared in an Ion element at the beginning of the file.

Source 

<xs:element name="current_voltage_relation" type="CurrentVoltageRelation">
  <xs:annotation>
    <xs:documentation>The specification of how the current flow etc. into the cell relates to the membrane potential difference (e.g. Ohmic relationship)</xs:documentation>
  </xs:annotation>
</xs:element>

Sample