vendors know this and understand the nuances of making their proprietary file formats important enough to force your loyalty, while making their tools flexible enough to accept the files of competitors . but markup advocates-and xml advocates in particular-point out that you needn t even submit to such seemingly benevolent captivity 供應(yīng)商知道這一點(diǎn)并理解其中的微妙之處:使他們的專用文件格式足夠重要,這樣您不得不“忠誠(chéng)”地使用他們的軟件,但同時(shí)又使他們的工具足夠靈活,可以接受由競(jìng)爭(zhēng)對(duì)手的軟件產(chǎn)生的文件格式。