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In this paper a discussion is made of the article by the HERMESCollaboration, Phys.Lett. B666,446, where several important results concerningstrange quark properties in the nucleon were presented. By analysing the sum ofK+- multiplicities it was found that the strange sea distribution is verydifferent from the non-strange one as a function of the Bjorken x scalingvariable. In addition, the magnitude of these two distributions at low x issimilar, contrary to the behaviour in most of the available parton distributionfunction sets. It is shown that the obtained distribution of the unpolarisedstrange quark influences our understanding of the "strange quark polarisationpuzzle". It is argued that the sole analysis of the sum of K+- multiplicities,as done in the HERMES paper, might not be sufficient to draw solid conclusionsabout the strange sector. A simultaneous analysis of the difference of K+-multiplicities should be done in general. To show that this is not simply anacademic case, the author presents an analysis based on the HERMES preliminarydata, where the sum and the difference of the K+- multiplicities areconsidered.

Comments on: "Measurement of Parton Distributions of Strange Quarks in  the Nucleon from Charged-Kaon Production in Deep-Inelastic Scattering on the  Deuteron" by the HERMES Collaboration