Consistency Verification for GML Data Based on DOM

GML schemas are metadata files, which define the structure, content and restriction of GML instances. As a kernel of the GML parser, consistency verification decides whether GML documents are consistent with the relevant application schemas. In order to parse GML data more effectively and accurately, an algorithm based on DOM was developed as to how GML consistency can be verified. Furthermore, some primary user-defined methods and the homologous regular expression technology, involving in this algorithm, were discussed in detail. Experimental results show that the consistency verification algorithm is efficient.