{"Protein" : 
  {"items" : ["UniProt", "BioCyc", "IUBMB", "Entrez-Gene", "KEGG", "Synonyms"],
    "BioCyc": {"mdtag" : "BioCyc-id",
        "type" : "val",
        "tag"  : "BioCyc" },
    "IUBMB": {"mdtag" : "IUBMB-id",
        "type" : "val",
        "tag"  : "IUBMB" },
    "Entrez-Gene": {"mdtag" : "Entrez-Gene-id",
        "type" : "val",
        "tag"  : "Entrez-Gene" },
    "KEGG": {"mdtag" : "kegg-id",
        "type" : "val",
        "tag"  : "KEGG" },
    "UniProt" : {"mdtag" : "Swiss-Prot-id",
       "type" : "link",
       "tag"  : "UniProt", 
       "link" : "http://www.uniprot.org/uniprot/%arg" },
    "PMID" : {"mdtag" : "PMID",
       "type" : "list",
       "tag"  : "PMID",
       "fun" : "ident"},
    "Synonyms" : {"mdtag" : "synonyms",
       "type" : "list",
       "tag"  : "Synonyms",
       "fun" : "ident"}
   },
 "Chemical" :
   {"items" : ["CID", "SID", "IUPAC", "SMILES" "Synonyms"],
    "CID": {"mdtag" : "CID",
        "type" : "val",
        "tag"  : "CID" },
    "SID": {"mdtag" : "SID",
        "type" : "val",
        "tag"  : "SID" },
    "IUPAC": {"mdtag" : "IUPAC",
        "type" : "val",
        "tag"  : "IUPAC" },
    "SMILES": {"mdtag" : "smiles",
        "type" : "val",
        "tag"  : "SMILES" },
    "Synonyns" : {"mdtag" : "synonyms",
      "type" : "list",
      "tag"  : "Synonyms",
      "fun" : "ident"}
  }

}

