app/views/das/show.xml.erb
<?xml version="1.0" standalone="yes"?>
<!DOCTYPE DASGFF SYSTEM "http://www.biodas.org/dtd/dasgff.dtd">
<DASGFF>
<GFF version="1.0" href="<%= request.url %>">
<% @user_snps.each_with_index do |s, i| %>
<% if @unkown_chromosome[i] == false %>
<SEGMENT id="<%= @id[i] %>" version="1.0" <%if @has_start[i] == true %> start="<%= @start_and_end[i][0] %>" stop="<%= @start_and_end[i][1] %>"<%else%> start="1" stop="" <%end%>>
<% @user_snps[i].each do |us| %>
<% if us.nil? or us.snp.nil?%>
<% next %>
<% end %>
<FEATURE id="<%= us.snp.name %>">
<TYPE id="<%= us.local_genotype %>" />
<METHOD id="" />
<START>
<%= us.snp.position %>
</START>
<END>
<%= us.snp.position %>
</END>
<LINK href="<%= root_url+"snps/" + us.snp.name %>">
<%= root_url+"snps/" + us.snp.name %>
</LINK>
</FEATURE>
<% end %>
</SEGMENT>
<%else%>
<UNKNOWNSEGMENT id="<%=@id%>" />
<%end%>
<% end %>
</GFF>
</DASGFF>