return ' '.join(parts)

# Function names must start with _ to avoid collisions with real tags

# Functions take arguments (doc, node)

funcs = {'_alt': alt, '_range': range_, '_avg': avg, '_date': date,

def process(doc, node=None):

    if node == None: node = doc.documentElement

def unescape(str_): return HTMLParser().unescape(str_)

def get_id(node): return node.getAttribute('id')

ptr_suffix = '_id'

def ptr_type(node_name):

    assert is_ptr(node_name)

    return sql.select(db, table, fields, conds)

def put(db, node, store_ids=False, row_ct_ref=None, pkeys=None, parent_id=None):

    if pkeys == None: pkeys = {}

    def pkey(table): return sql.pkey(db, pkeys, table)

            break

        except sql.NullValueException, ex:

            if try_num > 0: raise # exception still raised after retry

                # Search for required column in ancestors and their children

                target = find_by_name(node, ptr_type(ex.col))

                if target == None: raise

def xml2db(db, node, row_ct_ref=None):

    iter_ = xml_dom.NodeElemIter(node)

    util.skip(iter_, xml_dom.is_text) # skip metadata