Programming Web Services with SOAP

Colophon

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The animal on the cover of Programming Web Services with SOAP is a sea sponge. There are thousands of species of sponge (Phylum Porifera). Sponges are simple, multicellular animals that feed and breathe by filtering water. They are covered with tiny pores called ostia, which lead to an internal system of canals coated with sticky cells called choanocytes, or collar cells. These cells facilitate water through the canals with constantly moving flagella, picking up oxygen and pieces of food, and carrying out carbon dioxide and waste. The water passes out of the sponge through larger pores called oscula.

Free-standing and encrusting sea sponges live at the bottom of the ocean, in deep and shallow waters. Free-standing sponges can grow to gigantic sizes, and crab, shrimp, sea slugs, and starfish are often found living inside. Encrusting sponges attach themselves to rocks, shells, wood, and kelp. Some sponges produce toxic chemicals, possibly to give them a bad taste to predators. Other sponges have sharp, prickly spines as their only defense.

Colleen Gorman was the production editor and copyeditor for Programming Web Services with SOAP. Linley Dolby and Matt Hutchinson provided quality control. Phil Dangler and Camilla Ammirati provided ...