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The first is a visual representation of the familiar " containers " metaphor for XML elements , the second is tree view of element hierarchy where pieces of the document can be collapsed and expanded . " What do you do when your computers get too slow to handle the latest accounting , CAD , or graphics applications , or when files get too numerous for hard drives to hold ? The author reveals the advancing spirit of this code and how readers can have victorious faith over the coming microchip ... The proposals signal an early willingness on the part of House Democrats to put pressure on their colleagues in the Senate , where lawmakers from both parties are cooler to some of the ideas . That 's why liberals are going crazy now .