Fig. 3
From: SPANG: a SPARQL client supporting generation and reuse of queries for distributed RDF databases
Example command line for executing combinatorial query using SPANG. The command line accesses two databases: MBGD and UniProt. Combinatorial querying against multiple databases is achieved by connecting queries through a Unix pipe. The specified commands first search MBGD for orthologs of K9Z723 and then search UniProt for their protein annotations. mbgdl:get_ortholog is a SPARQL template to obtain ortholog members of a given UniProt ID (see Additional file 2 for the code). The placeholder $1 in the SPARQL template is dynamically replaced by the specified parameter. The command-line option -S 1 is used to set the values from the first column of the standard input as subject